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Posted: 1/6/2016 5:30:52 PM EDT
[#1]
threaded pin for bolt catch
i noticed that the AP M5 threaded bolt catch pin doesn't seem to have a firm stop, and even though i lubed the threads for this pin with moly grease, some very fine aluminum shaving were showing up. and i only made that pin "finger tight" since i am paranoid about stripping out those threads. anyways, in the process of fitting a DPMS bolt catch (i like the lower button), i gauged the depth of the pin hole, and it is way deep, the pin on the end of the set screw doesn't seat on the bottom of that hole. i had some left-over 3/32" SS rod (from pinning & welding FH's on 14.5's) and using a toothpick to gauge the appropriate length, cut off a piece, it's about 3/8" inch long, trial & error fitted. inserted that short SS rod segment into the bottom of the hole, and now the threaded bolt catch pin has a firmer stop. worth mentioning that there was beaucoup aluminum shavings in the bottom of that hole left over from the lower receiver manufacturing process. had to get that out first before starting the measuring & fitting exercise. i rounded off the end of the SS rod that goes into the hole, so that a firm vertical rap of the buttstock on the ground will drop the pin right out. |
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Posted: 1/6/2016 7:00:57 PM EDT
[#2]
Quote HistoryQuoted: threaded pin for bolt catch i noticed that the AP M5 threaded bolt catch pin doesn't seem to have a firm stop, and even though i lubed the threads for this pin with moly grease, some very fine aluminum shaving were showing up. and i only made that pin "finger tight" since i am paranoid about stripping out those threads. anyways, in the process of fitting a DPMS bolt catch (i like the lower button), i gauged the depth of the pin hole, and it is way deep, the pin on the end of the set screw doesn't seat on the bottom of that hole. i had some left-over 3/32" SS rod (from pinning & welding FH's on 14.5's) and using a toothpick to gauge the appropriate length, cut off a piece, it's about 3/8" inch long, trial & error fitted. inserted that short SS rod segment into the bottom of the hole, and now the threaded bolt catch pin has a firmer stop. worth mentioning that there was beaucoup aluminum shavings in the bottom of that hole left over from the lower receiver manufacturing process. had to get that out first before starting the measuring & fitting exercise. i rounded off the end of the SS rod that goes into the hole, so that a firm vertical rap of the buttstock on the ground will drop the pin right out. Very cool! |
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Posted: 1/6/2016 7:38:47 PM EDT
[#3]
Quote HistoryQuoted:
installed UTG Pro 15" keymod rail on my Aero M5. some pics at the critical rail mating edge. i'd say it's right on level. those little anti-rotation tabs are an EXACT fit. rock solid, no movement at all. the button-head screws are 3mm hex key (allen key is included). http://i837.photobucket.com/albums/zz300/rpol98/G%20and%20A/P1010913_zpsqxgq90qy.jpg http://i837.photobucket.com/albums/zz300/rpol98/G%20and%20A/P1010911_zpsphb03ewp.jpg Does it come with the he barrel nut aswell if not which one did you use, I like how well it mats to the reciever. |
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Posted: 1/6/2016 7:53:07 PM EDT
[#4]
+188slo50, re: UTG KM rail
it comes with it's own barrel nut. i had to use one of the 3 included shims so that the rail attachment bolt holes weren't covered up. ETA: the torque spec for the 6 screws is 25 inch pounds. which is not a lot. luckily i have a torque wrench in that range used for measuring diff pinion bearing preload, and i went and got a 3mm 1/4" dr hex bit, kinda surprised at how light, i had overtightened them on the first go-round before i got the hex bit. definitely not gorilla torque. |
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Posted: 1/6/2016 9:27:54 PM EDT
[#5]
Quote HistoryQuoted:
+188slo50, re: UTG KM rail it comes with it's own barrel nut. i had to use one of the 3 included shims so that the rail attachment bolt holes weren't covered up. Ok thanks |
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Posted: 1/8/2016 5:38:31 AM EDT
[#6]
Replaced the scope with a refurbished FFP Vortex Viper PST 6-24×50 EBR-1 that I scored from Cabelas for $525 
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Posted: 1/8/2016 10:30:09 AM EDT
[#7]
Just waiting on my SilencerCo Harvester Suppressor to finish off the build
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Posted: 1/9/2016 6:05:56 AM EDT
[#8]
Anyone find a source for the LPK minus fcg?
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Posted: 1/9/2016 12:50:17 PM EDT
[#9]
Anyone else having issues with their Aero uppers not accepting ejection port covers? I've tried two now and neither will snap into place. If I depress the plunger on the cover though, both will. See below for pictures. Feedback definitely appreciated.
After I depress the cover plunger with a small flat head screwdriver: 
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Posted: 1/9/2016 1:07:56 PM EDT
[#10]
Quote HistoryQuoted:
Anyone else having issues with their Aero uppers not accepting ejection port covers? I've tried two now and neither will snap into place. If I depress the plunger on the cover though, both will. See below for pictures. Feedback definitely appreciated. <a href="http://s47.photobucket.com/user/latechsan/media/FA/IMG_7550_zpsuu27u7cm.jpg.html" target="_blank">http://i47.photobucket.com/albums/f165/latechsan/FA/IMG_7550_zpsuu27u7cm.jpg</a> <a href="http://s47.photobucket.com/user/latechsan/media/FA/IMG_7549_zps2eitzwpj.jpg.html" target="_blank">http://i47.photobucket.com/albums/f165/latechsan/FA/IMG_7549_zps2eitzwpj.jpg</a> <a href="http://s47.photobucket.com/user/latechsan/media/FA/IMG_7548_zpswpwrjtuq.jpg.html" target="_blank">http://i47.photobucket.com/albums/f165/latechsan/FA/IMG_7548_zpswpwrjtuq.jpg</a> <a href="http://s47.photobucket.com/user/latechsan/media/FA/IMG_7547_zps2mw5nre8.jpg.html" target="_blank">http://i47.photobucket.com/albums/f165/latechsan/FA/IMG_7547_zps2mw5nre8.jpg</a> After I depress the cover plunger with a small flat head screwdriver: <a href="http://s47.photobucket.com/user/latechsan/media/FA/IMG_7551_zpsru1i6rhu.jpg.html" target="_blank">http://i47.photobucket.com/albums/f165/latechsan/FA/IMG_7551_zpsru1i6rhu.jpg</a> I had a aR15 that was like this. I used a round rat tail file and took a little material from the upper where the divot goes. Works like a charm. |
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Posted: 1/9/2016 1:17:25 PM EDT
[#11]
Quote HistoryQuoted:
Anyone else having issues with their Aero uppers not accepting ejection port covers? I've tried two now and neither will snap into place. If I depress the plunger on the cover though, both will. See below for pictures. Feedback definitely appreciated. <a href="http://s47.photobucket.com/user/latechsan/media/FA/IMG_7550_zpsuu27u7cm.jpg.html" target="_blank">http://i47.photobucket.com/albums/f165/latechsan/FA/IMG_7550_zpsuu27u7cm.jpg</a> <a href="http://s47.photobucket.com/user/latechsan/media/FA/IMG_7549_zps2eitzwpj.jpg.html" target="_blank">http://i47.photobucket.com/albums/f165/latechsan/FA/IMG_7549_zps2eitzwpj.jpg</a> <a href="http://s47.photobucket.com/user/latechsan/media/FA/IMG_7548_zpswpwrjtuq.jpg.html" target="_blank">http://i47.photobucket.com/albums/f165/latechsan/FA/IMG_7548_zpswpwrjtuq.jpg</a> <a href="http://s47.photobucket.com/user/latechsan/media/FA/IMG_7547_zps2mw5nre8.jpg.html" target="_blank">http://i47.photobucket.com/albums/f165/latechsan/FA/IMG_7547_zps2mw5nre8.jpg</a> After I depress the cover plunger with a small flat head screwdriver: <a href="http://s47.photobucket.com/user/latechsan/media/FA/IMG_7551_zpsru1i6rhu.jpg.html" target="_blank">http://i47.photobucket.com/albums/f165/latechsan/FA/IMG_7551_zpsru1i6rhu.jpg</a> Try one of these - http://www.strikeindustries.com/shop/index.php/products/rifle-accessories/ar/upper-parts/ultimate-dust-cover-for-308-656.html#.VpE_0bYrK2w You can push the detent ball down with a small flat-blade screwdriver and turn a threaded insert in or out to adjust fit and tension. Features: - Patent pending spring-loaded, internal detent rod for easy installation and take-down. - Constructed with lightweight durable polymer material - Will never corrode rust or fade - Will never deform or get bent out of shape - Comes in a variety of designs - Patent pending, True Seal internal lip that seals the port tighter than traditional dust cover designs. - Built-in adjustable detent set screw to compensate for wear on the receiver. -Available for AR-15 and AR-10 |
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Posted: 1/9/2016 1:40:48 PM EDT
[#12]
Quote HistoryQuoted:
Try one of these - http://www.strikeindustries.com/shop/index.php/products/rifle-accessories/ar/upper-parts/ultimate-dust-cover-for-308-656.html#.VpE_0bYrK2w You can push the detent ball down with a small flat-blade screwdriver and turn a threaded insert in or out to adjust fit and tension. Features: - Patent pending spring-loaded, internal detent rod for easy installation and take-down. - Constructed with lightweight durable polymer material - Will never corrode rust or fade - Will never deform or get bent out of shape - Comes in a variety of designs - Patent pending, True Seal internal lip that seals the port tighter than traditional dust cover designs. - Built-in adjustable detent set screw to compensate for wear on the receiver. -Available for AR-15 and AR-10 Solid find Repairman. Did you have to go this route as well? |
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Posted: 1/9/2016 1:47:02 PM EDT
[#13]
Quote HistoryQuoted:
Anyone else having issues with their Aero uppers not accepting ejection port covers? I've tried two now and neither will snap into place. If I depress the plunger on the cover though, both will. See below for pictures. Feedback definitely appreciated. <a href="http://s47.photobucket.com/user/latechsan/media/FA/IMG_7550_zpsuu27u7cm.jpg.html" target="_blank">http://i47.photobucket.com/albums/f165/latechsan/FA/IMG_7550_zpsuu27u7cm.jpg</a> <a href="http://s47.photobucket.com/user/latechsan/media/FA/IMG_7549_zps2eitzwpj.jpg.html" target="_blank">http://i47.photobucket.com/albums/f165/latechsan/FA/IMG_7549_zps2eitzwpj.jpg</a> <a href="http://s47.photobucket.com/user/latechsan/media/FA/IMG_7548_zpswpwrjtuq.jpg.html" target="_blank">http://i47.photobucket.com/albums/f165/latechsan/FA/IMG_7548_zpswpwrjtuq.jpg</a> <a href="http://s47.photobucket.com/user/latechsan/media/FA/IMG_7547_zps2mw5nre8.jpg.html" target="_blank">http://i47.photobucket.com/albums/f165/latechsan/FA/IMG_7547_zps2mw5nre8.jpg</a> After I depress the cover plunger with a small flat head screwdriver: <a href="http://s47.photobucket.com/user/latechsan/media/FA/IMG_7551_zpsru1i6rhu.jpg.html" target="_blank">http://i47.photobucket.com/albums/f165/latechsan/FA/IMG_7551_zpsru1i6rhu.jpg</a> I have the same problem. I guess we could Dremel on the upper until the dust cover fits right. What could go wrong? 
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Posted: 1/9/2016 1:57:23 PM EDT
[#14]
Quote HistoryQuoted:
I have the same problem. I guess we could Dremel on the upper until the dust cover fits right. What could go wrong? Haha. With me? Everything would good wrong. Literally everything. Since I now have two covers, I've considered trying to tinker around with filing the plunger on one. I don't know how well I'll be able to fill the round top of the plunger tho... Repairman's option is starting to look better and better. |
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Posted: 1/9/2016 2:22:51 PM EDT
[#15]
Quote HistoryQuoted:
Haha. With me? Everything would good wrong. Literally everything. Since I now have two covers, I've considered trying to tinker around with filing the plunger on one. I don't know how well I'll be able to fill the round top of the plunger tho... Repairman's option is starting to look better and better. Quote HistoryQuoted:
Quoted:
I have the same problem. I guess we could Dremel on the upper until the dust cover fits right. What could go wrong? Haha. With me? Everything would good wrong. Literally everything. Since I now have two covers, I've considered trying to tinker around with filing the plunger on one. I don't know how well I'll be able to fill the round top of the plunger tho... Repairman's option is starting to look better and better. Why not use a file like I mentioned above and save your money? Only a very little material needs to be removed. The paint is going to wear through through in that spot anyway, unless your not planning on shooting it. |
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Posted: 1/10/2016 6:33:51 AM EDT
[#17]
I am having an issue that I have never had when I built my ar15's. After I put my upper together with a mega arms barrel, aero upper and an aero BCG the bolt seems to be rotating too much when I try and cycle the BCG to put a round in the chamber. I have tried to do it with the upper off and can watch the bolt and see that it is rotating just a small amount past the opening of the locking lugs and hanging on the edge. It takes a few tries to get it to finally let go. Do yall think that that would be an issue with my BCG being out of spec or something else? Any help would be appreciated.
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Posted: 1/10/2016 11:26:59 AM EDT
[#18]
As soon as I can get my hands on a lower I'm going to start my build. I dont believe I've seen what kind of upper reciever holding devices you guys are using with these to barrel the upper. Need to get one on order so I have it. Any input? There are alot of nice rifles in this thread. I've been drooling for another large frame after I got rid of my MWS several years ago.
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Posted: 1/10/2016 12:50:34 PM EDT
[#19]
Quote HistoryQuoted:
I am having an issue that I have never had when I built my ar15's. After I put my upper together with a mega arms barrel, aero upper and an aero BCG the bolt seems to be rotating too much when I try and cycle the BCG to put a round in the chamber. I have tried to do it with the upper off and can watch the bolt and see that it is rotating just a small amount past the opening of the locking lugs and hanging on the edge. It takes a few tries to get it to finally let go. Do yall think that that would be an issue with my BCG being out of spec or something else? Any help would be appreciated. I have roughly the same parts as you (assuming Toolcraft makes both AIM's and Aero's) and my shit won't cycle well with a cartridge. Doesn't like to feed, is a PITA to extract. On an empty chamber, feels normal. I'll look at the bolt with the upper off. |
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Posted: 1/10/2016 2:17:50 PM EDT
[#20]
Quote HistoryQuoted:
I have roughly the same parts as you (assuming Toolcraft makes both AIM's and Aero's) and my shit won't cycle well with a cartridge. Doesn't like to feed, is a PITA to extract. On an empty chamber, feels normal. I'll look at the bolt with the upper off. Quote HistoryQuoted:
Quoted:
I am having an issue that I have never had when I built my ar15's. After I put my upper together with a mega arms barrel, aero upper and an aero BCG the bolt seems to be rotating too much when I try and cycle the BCG to put a round in the chamber. I have tried to do it with the upper off and can watch the bolt and see that it is rotating just a small amount past the opening of the locking lugs and hanging on the edge. It takes a few tries to get it to finally let go. Do yall think that that would be an issue with my BCG being out of spec or something else? Any help would be appreciated. I have roughly the same parts as you (assuming Toolcraft makes both AIM's and Aero's) and my shit won't cycle well with a cartridge. Doesn't like to feed, is a PITA to extract. On an empty chamber, feels normal. I'll look at the bolt with the upper off. Mine is doing it with no round loaded. I sent aero an email last night waiting for a response. |
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Posted: 1/10/2016 2:40:21 PM EDT
[#21]
Sharing my experience with my Aero M5 upper and lower. Hope it help's people trying to figure out a build.
Lower; -Aero M5 308 lower -Aero lower parts kit -Rock River 2 stage national match trigger -Ergo grip -VLTOR A5 receiver extension -VLTOR Emod stock -Springco red spring -H2 buffer (carbine length) Upper Receiver Group; -Aero M5 upper receiver -Aero upper receiver port door and forward assist -BCM Mod 4 charging handle -Fullton Armory Barrel, 18.5", rifle length, Medium Weight, 1x10, Stainless, Match Quality, Made by Criterion -Fulton Armory gas block and rifle length gas tube -SLR Rifleworks 15" 308 Solo Lite Series Hand Guard - MLOK -Precision Armament M4-72 Severe-Duty Compensator -AIM Sirplus bolt carrier group Everything went together smoth except for a little material had to be taken of the BCM charging handle. Ammo used; -prvi partizan 308 168gr hpbt match -PMC 150gr 308 -federal 7.62x51 149gr xm80cs Magazines tested; -PMAG 25 magpul -Brownells 20 round aluminum -IMI 20 Hit the range yesterday to function test. Shot very SMOOTH! Ejection was a consistent 3 o'clock with 3 types of ammo and bolt held back on last round fired. Magazines all functioned well with only one exception. The IMI Magazine wouldn't fully seat the bolt carrier while charging the first round. The round would chamber but the bolt didn't fully seat. This only happened while charging. I had to drop the mag, charge, the reinsert the mag then it functioned properly for the rest of the rounds. Oh, and this is how figured that the forward assist is worthless. It moves the carrier but hardly. The PMAG and Brownells magazines worked flawlessly.  </a>" />
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Posted: 1/11/2016 2:39:13 AM EDT
[#22]
+Mustang31:
sounds like you also got one of those out-of-spec AeroPrecision forward assist. on the several AP uppers that i have, including the one i just got last week, the forward assist had to be replaced with one from my AR-15 stash. try it. i'm kinda surprised that AP hasn't gotten the memo yet. some others have run into the same discovery. +YukonBoy03: sure sounds like headspace to me. i'm thinking the barrel. the chamber is maybe a couple thousands too short. i had that issue with 2 barrels from 2 reputable mfrs. the last barrel i got from Schuylers (on sale, actually a BA) checked out perfectly with the headspace gage, and also functioned perfectly at the range during a function test & scope zero session. |
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Posted: 1/11/2016 2:53:25 AM EDT
[#23]
Never mind I figured out my issue. I feel dumb...just needed to lube up the bolt a little more now no more issues guess i'm a little spoiled on nib bcg's and this phosphate needed more than i'm used to.
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Posted: 1/11/2016 10:19:46 AM EDT
[#24]
Quote HistoryQuoted:
+Mustang31: sounds like you also got one of those out-of-spec AeroPrecision forward assist. on the several AP uppers that i have, including the one i just got last week, the forward assist had to be replaced with one from my AR-15 stash. try it. i'm kinda surprised that AP hasn't gotten the memo yet. some others have run into the same discovery. +YukonBoy03: sure sounds like headspace to me. i'm thinking the barrel. the chamber is maybe a couple thousands too short. i had that issue with 2 barrels from 2 reputable mfrs. the last barrel i got from Schuylers (on sale, actually a BA) checked out perfectly with the headspace gage, and also functioned perfectly at the range during a function test & scope zero session. Josh has some headspace gauges, so I am going to get them from him to test. but... also tested chambering and extracting unfired brass with no bullet, about the same difficulty. The testing is leaving some notable parallel lines on the brass too. |
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Posted: 1/11/2016 1:38:00 PM EDT
[#25]
Quote HistoryQuoted:
Sharing my experience with my Aero M5 upper and lower. Hope it help's people trying to figure out a build. Lower; -Aero M5 308 lower -Aero lower parts kit -Rock River 2 stage national match trigger -Ergo grip -VLTOR A5 receiver extension -VLTOR Emod stock -Springco red spring -H2 buffer (carbine length) Upper Receiver Group; -Aero M5 upper receiver -Aero upper receiver port door and forward assist -BCM Mod 4 charging handle -Fullton Armory Barrel, 18.5", rifle length, Medium Weight, 1x10, Stainless, Match Quality, Made by Criterion -Fulton Armory gas block and rifle length gas tube -SLR Rifleworks 15" 308 Solo Lite Series Hand Guard - MLOK -Precision Armament M4-72 Severe-Duty Compensator -AIM Sirplus bolt carrier group Everything went together smoth except for a little material had to be taken of the BCM charging handle. Ammo used; -prvi partizan 308 168gr hpbt match -PMC 150gr 308 -federal 7.62x51 149gr xm80cs Magazines tested; -PMAG 25 magpul -Brownells 20 round aluminum -IMI 20 Hit the range yesterday to function test. Shot very SMOOTH! Ejection was a consistent 3 o'clock with 3 types of ammo and bolt held back on last round fired. Magazines all functioned well with only one exception. The IMI Magazine wouldn't fully seat the bolt carrier while charging the first round. The round would chamber but the bolt didn't fully seat. This only happened while charging. I had to drop the mag, charge, the reinsert the mag then it functioned properly for the rest of the rounds. Oh, and this is how figured that the forward assist is worthless. It moves the carrier but hardly. The PMAG and Brownells magazines worked flawlessly. http://<a href=http://i285.photobucket.com/albums/ll56/navarro98gt/Mobile%20Uploads/image_zpsotemy92y.jpeg</a>" /> Mustang, this is great. Thanks for all of the details and pics. I'm struggling trying to figure out which barrel/rail/gas block combo. I've documented my questions here and here . Basically, which barrel length (18 or 20) for a rifle length gas system and ideally, I'd like for my first AR-10/308 AR build to have a SR-25/M110/KAC FF RAS look to it, but struggling to confirm parts details. I just need to spend more time on it. |
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Posted: 1/11/2016 3:14:32 PM EDT
[#26]
Quote HistoryQuoted:
+Mustang31: sounds like you also got one of those out-of-spec AeroPrecision forward assist. on the several AP uppers that i have, including the one i just got last week, the forward assist had to be replaced with one from my AR-15 stash. try it. i'm kinda surprised that AP hasn't gotten the memo yet. some others have run into the same discovery. I'm sure that I have an extra forward assist in the parts bin. Thank you for the advice. |
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Posted: 1/15/2016 1:54:55 PM EDT
[#27]
Getting closer to having all of the parts for my AP M5 build. So need to focus on tools. I have everything for upper/lower AR15 builds, but what do I need specifically for the M5? Upper receiver block. Lower receiver block. Barrel wrench (I have a Gem State, so I think I just need to get the DPMS adapter). What are you using?
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Posted: 1/15/2016 6:31:39 PM EDT
[#28]
Quote HistoryQuoted:
Getting closer to having all of the parts for my AP M5 build. So need to focus on tools. I have everything for upper/lower AR15 builds, but what do I need specifically for the M5? Upper receiver block. Lower receiver block. Barrel wrench (I have a Gem State, so I think I just need to get the DPMS adapter). What are you using? What handguard are you using? |
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Posted: 1/15/2016 6:43:13 PM EDT
[#29]
Quote HistoryQuoted:
What handguard are you using? Quote HistoryQuoted:
Quoted:
Getting closer to having all of the parts for my AP M5 build. So need to focus on tools. I have everything for upper/lower AR15 builds, but what do I need specifically for the M5? Upper receiver block. Lower receiver block. Barrel wrench (I have a Gem State, so I think I just need to get the DPMS adapter). What are you using? What handguard are you using? Great question. I've post a couple of times in various subforums, but basically my #1 preference is to build a KAC SR-25 style rifle. Looking for a KAC SR-25 Free Float RAS rail or similar, A2 stock, But I can't find out if either the real KAC Full Length SR-25 Free Floating R.A.S. Forend (KAC P/N: 98513) will fit or if there are alternatives that are similar. Nor if the real one will fit. Pic of the style (not clone) I'd like to build below. 
Option #2 is probably either the AP M5 M-Lok or SLR or something similar. I like the quad rail look and I guess AP doesn't have that yet for 308. |
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Posted: 1/15/2016 7:48:03 PM EDT
[#30]
after talking with AIM, and then backed up by some google searches, looks like Mega 308 barrels are known for super tight chambers which may be causing the resistance giving my FTF and trouble manually extracting
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Posted: 1/15/2016 11:05:46 PM EDT
[#31]
Quote HistoryQuoted:
As soon as I can get my hands on a lower I'm going to start my build. I dont believe I've seen what kind of upper reciever holding devices you guys are using with these to barrel the upper. Need to get one on order so I have it. Any input? There are alot of nice rifles in this thread. I've been drooling for another large frame after I got rid of my MWS several years ago. http://www.brownells.com/gunsmith-tools-supplies/rifle-tools/barrel-tools/308-ar-barrel-extension-torque-tools-prod72374.aspx  
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Posted: 1/15/2016 11:22:23 PM EDT
[#32]
i used the Brownells torque extension tool (mentioned above) for getting the initial torque of the barrel nut to the barrel, since i'm using a pretty long 1/2" drive torque wrench.
after that i used a common 308 vise block for minor work, but anything subsequent that required applying any kind of muscle to the receiver, i got a set of those NOMAR receiver block sets, top half goes on the picatinny side, and the other half clips on to the bottom of the upper receiver, in a vise like a sandwich. i also got the vise block from NOMAR, they have a combo deal. |
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Posted: 1/16/2016 12:19:50 PM EDT
[#33]
Quote HistoryQuoted:
Great question. I've post a couple of times in various subforums, but basically my #1 preference is to build a KAC SR-25 style rifle. Looking for a KAC SR-25 Free Float RAS rail or similar, A2 stock, But I can't find out if either the real KAC Full Length SR-25 Free Floating R.A.S. Forend (KAC P/N: 98513) will fit or if there are alternatives that are similar. Nor if the real one will fit. Pic of the style (not clone) I'd like to build below. http://i18.photobucket.com/albums/b147/NukeThemTillTheyGlow/AR/kacsr25-1_zpsqgtkjdnp.jpg Option #2 is probably either the AP M5 M-Lok or SLR or something similar. I like the quad rail look and I guess AP doesn't have that yet for 308. Quote HistoryQuoted:
Quoted:
Quoted:
Getting closer to having all of the parts for my AP M5 build. So need to focus on tools. I have everything for upper/lower AR15 builds, but what do I need specifically for the M5? Upper receiver block. Lower receiver block. Barrel wrench (I have a Gem State, so I think I just need to get the DPMS adapter). What are you using? What handguard are you using? Great question. I've post a couple of times in various subforums, but basically my #1 preference is to build a KAC SR-25 style rifle. Looking for a KAC SR-25 Free Float RAS rail or similar, A2 stock, But I can't find out if either the real KAC Full Length SR-25 Free Floating R.A.S. Forend (KAC P/N: 98513) will fit or if there are alternatives that are similar. Nor if the real one will fit. Pic of the style (not clone) I'd like to build below. http://i18.photobucket.com/albums/b147/NukeThemTillTheyGlow/AR/kacsr25-1_zpsqgtkjdnp.jpg Option #2 is probably either the AP M5 M-Lok or SLR or something similar. I like the quad rail look and I guess AP doesn't have that yet for 308. There was (may still be) a KAC URX II black and FDE being sold in the EE recently. I was going to jump on one but it's out of my price range for right now. It was the rail and the appropriate barrel nut. |
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Posted: 1/16/2016 4:34:02 PM EDT
[#34]
Quote HistoryQuoted:
There was (may still be) a KAC URX II black and FDE being sold in the EE recently. I was going to jump on one but it's out of my price range for right now. It was the rail and the appropriate barrel nut. Quote HistoryQuoted:
Quoted:
Quoted:
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Getting closer to having all of the parts for my AP M5 build. So need to focus on tools. I have everything for upper/lower AR15 builds, but what do I need specifically for the M5? Upper receiver block. Lower receiver block. Barrel wrench (I have a Gem State, so I think I just need to get the DPMS adapter). What are you using? What handguard are you using? Great question. I've post a couple of times in various subforums, but basically my #1 preference is to build a KAC SR-25 style rifle. Looking for a KAC SR-25 Free Float RAS rail or similar, A2 stock, But I can't find out if either the real KAC Full Length SR-25 Free Floating R.A.S. Forend (KAC P/N: 98513) will fit or if there are alternatives that are similar. Nor if the real one will fit. Pic of the style (not clone) I'd like to build below. http://i18.photobucket.com/albums/b147/NukeThemTillTheyGlow/AR/kacsr25-1_zpsqgtkjdnp.jpg Option #2 is probably either the AP M5 M-Lok or SLR or something similar. I like the quad rail look and I guess AP doesn't have that yet for 308. There was (may still be) a KAC URX II black and FDE being sold in the EE recently. I was going to jump on one but it's out of my price range for right now. It was the rail and the appropriate barrel nut. Thanks. So a KAC URX II will fit the AP M5 upper? Which barrel nut does it need? Can you confirm that the SR-25 FF RAS rail will fit too? |
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Posted: 1/17/2016 2:23:24 AM EDT
[#35]
Quote HistoryQuoted:
Sharing my experience with my Aero M5 upper and lower. Hope it help's people trying to figure out a build. Lower; -Aero M5 308 lower -Aero lower parts kit -Rock River 2 stage national match trigger -Ergo grip -VLTOR A5 receiver extension -VLTOR Emod stock -Springco red spring -H2 buffer (carbine length) Upper Receiver Group; -Aero M5 upper receiver -Aero upper receiver port door and forward assist -BCM Mod 4 charging handle -Fullton Armory Barrel, 18.5", rifle length, Medium Weight, 1x10, Stainless, Match Quality, Made by Criterion -Fulton Armory gas block and rifle length gas tube -SLR Rifleworks 15" 308 Solo Lite Series Hand Guard - MLOK -Precision Armament M4-72 Severe-Duty Compensator -AIM Sirplus bolt carrier group http://<a href=http://i285.photobucket.com/albums/ll56/navarro98gt/Mobile%20Uploads/image_zpsotemy92y.jpeg</a>" /> I am very impressed with the Fulton barrel. It shot very acturatly with prvi partizan 168 hpbt. |
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Posted: 1/17/2016 12:58:10 PM EDT
[#36]
Has anyone else noticed a loose fit between an Aero upper and a barrel extension? The fit was very loose between my M5 receiver and a Rainier Ultramatch barrel. I wrapped 0.001" stainless steel shim stock around the extension twice and I could still slide the barrel in by hand. On a .223 BCM upper I wrapped 0.001" shim stock 3/4 around an .223 ultramatch barrel extension and had to use a rubber mallet to tap on the flash hider to get the barrel seated in all the way. I took the shim out of the BCM upper due to concerns about the KMR barrel nut not being able to fully seat the barrel extension against the upper with only 40 ft-lbs of torque.
The rifle still shoots great with FGMM 168 gr, Hornady 168 gr HPBT, Outback 165 gr GameKing, and Hornady 165 gr SPBT - Just wondering if anyone else experienced this and have things changed, I may build another one in the near future. |
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Posted: 1/17/2016 2:18:52 PM EDT
[#37]
i have a Rainier Select barrel in a M5 upper and it's appropriately snug, not loose, need to exert some effort to slide it in.
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Posted: 1/17/2016 3:12:34 PM EDT
[#38]
Quote HistoryQuoted:
i have a Rainier Select barrel in a M5 upper and it's appropriately snug, not loose, need to exert some effort to slide it in. Mine too. Have the AP upper and the Rainier Select 18". Very snug fit; I doubt I could get any shim stock around the extension and still be able to get the barrel to start into the upper. |
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Posted: 1/17/2016 5:18:52 PM EDT
[#39]
Quote HistoryQuoted:
Mine too. Have the AP upper and the Rainier Select 18". Very snug fit; I doubt I could get any shim stock around the extension and still be able to get the barrel to start into the upper. Quote HistoryQuoted:
Quoted:
i have a Rainier Select barrel in a M5 upper and it's appropriately snug, not loose, need to exert some effort to slide it in. Mine too. Have the AP upper and the Rainier Select 18". Very snug fit; I doubt I could get any shim stock around the extension and still be able to get the barrel to start into the upper. Samesies with the rainier arms ultra match LR |
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Posted: 1/17/2016 5:41:16 PM EDT
[#40]
Quote HistoryQuoted:
i have a Rainier Select barrel in a M5 upper and it's appropriately snug, not loose, need to exert some effort to slide it in. Not so with the Criterion barrel. It is loose enough it wobbles |
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Posted: 1/18/2016 1:52:16 AM EDT
[#41]
I used the DPMS Claw vise block to install my BA barrel to a AP M5 upper. Barrel fit snug, can't be happier with the Odin Works 12.5 keymod rail. Gun is running like it should, loving it.
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Posted: 1/18/2016 2:04:23 AM EDT
[#42]
Quote HistoryQuoted:
I used the DPMS Claw vise block to install my BA barrel to a AP M5 upper. Barrel fit snug, can't be happier with the Odin Works 12.5 keymod rail. Gun is running like it should, loving it. <a href="http://s497.photobucket.com/user/redyak3/media/308/IMG_0116.jpg.html" target="_blank">http://i497.photobucket.com/albums/rr335/redyak3/308/IMG_0116.jpg</a> How do you like the JMT lower? |
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Posted: 1/18/2016 9:00:08 AM EDT
[#43]
Quote HistoryQuoted:
after talking with AIM, and then backed up by some google searches, looks like Mega 308 barrels are known for super tight chambers which may be causing the resistance giving my FTF and trouble manually extracting That's odd. I've had Zero issues with my Mega barrel from AIM. Are you using an adjustable gas block??? |
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Posted: 1/18/2016 2:04:08 PM EDT
[#44]
Quote HistoryQuoted:
How do you like the JMT lower? Quote HistoryQuoted:
Quoted:
I used the DPMS Claw vise block to install my BA barrel to a AP M5 upper. Barrel fit snug, can't be happier with the Odin Works 12.5 keymod rail. Gun is running like it should, loving it. <a href="http://s497.photobucket.com/user/redyak3/media/308/IMG_0116.jpg.html" target="_blank">http://i497.photobucket.com/albums/rr335/redyak3/308/IMG_0116.jpg</a> How do you like the JMT lower? Like it, going to order another. |
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Posted: 1/18/2016 3:38:01 PM EDT
[#45]
Quote HistoryQuoted:
Thanks. So a KAC URX II will fit the AP M5 upper? Which barrel nut does it need? Can you confirm that the SR-25 FF RAS rail will fit too? Quote HistoryQuoted:
Quoted:
Quoted:
Quoted:
Quoted:
Getting closer to having all of the parts for my AP M5 build. So need to focus on tools. I have everything for upper/lower AR15 builds, but what do I need specifically for the M5? Upper receiver block. Lower receiver block. Barrel wrench (I have a Gem State, so I think I just need to get the DPMS adapter). What are you using? What handguard are you using? Great question. I've post a couple of times in various subforums, but basically my #1 preference is to build a KAC SR-25 style rifle. Looking for a KAC SR-25 Free Float RAS rail or similar, A2 stock, But I can't find out if either the real KAC Full Length SR-25 Free Floating R.A.S. Forend (KAC P/N: 98513) will fit or if there are alternatives that are similar. Nor if the real one will fit. Pic of the style (not clone) I'd like to build below. http://i18.photobucket.com/albums/b147/NukeThemTillTheyGlow/AR/kacsr25-1_zpsqgtkjdnp.jpg Option #2 is probably either the AP M5 M-Lok or SLR or something similar. I like the quad rail look and I guess AP doesn't have that yet for 308. There was (may still be) a KAC URX II black and FDE being sold in the EE recently. I was going to jump on one but it's out of my price range for right now. It was the rail and the appropriate barrel nut. Thanks. So a KAC URX II will fit the AP M5 upper? Which barrel nut does it need? Can you confirm that the SR-25 FF RAS rail will fit too? Based on what I could find, the SR-25 rails, be it FF RAS or URX should fit the M5 upper. The URX uses a proprietary KAC barrel nut, not sure about the RAS. |
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Posted: 1/18/2016 4:30:14 PM EDT
[#46]
Quote HistoryQuoted:
Getting closer to having all of the parts for my AP M5 build. So need to focus on tools. I have everything for upper/lower AR15 builds, but what do I need specifically for the M5? Upper receiver block. Lower receiver block. Barrel wrench (I have a Gem State, so I think I just need to get the DPMS adapter). What are you using What handguard are you using? Great question. I've post a couple of times in various subforums, but basically my #1 preference is to build a KAC SR-25 style rifle. Looking for a KAC SR-25 Free Float RAS rail or similar, A2 stock, But I can't find out if either the real KAC Full Length SR-25 Free Floating R.A.S. Forend (KAC P/N: 98513) will fit or if there are alternatives that are similar. Nor if the real one will fit. Pic of the style (not clone) I'd like to build below. http://i18.photobucket.com/albums/b147/NukeThemTillTheyGlow/AR/kacsr25-1_zpsqgtkjdnp.jpg Option #2 is probably either the AP M5 M-Lok or SLR or something similar. I like the quad rail look and I guess AP doesn't have that yet for 308. There was (may still be) a KAC URX II black and FDE being sold in the EE recently. I was going to jump on one but it's out of my price range for right now. It was the rail and the appropriate barrel nut. Thanks. So a KAC URX II will fit the AP M5 upper? Which barrel nut does it need? Can you confirm that the SR-25 FF RAS rail will fit too? Based on what I could find, the SR-25 rails, be it FF RAS or URX should fit the M5 upper. The URX uses a proprietary KAC barrel nut, not sure about the RAS. Excellent, that's the impression I was getting, but I could not find anything definitive or pics/examples where others had mounted either KAC rail as well as the proper height. I was beginning to think I was the only one ever to try to build a SR-25 clone(ish) rifle with AP receivers. I'd prefer the FF RAS style if possible due to the special tools needed for the URX. Then the question becomes where to find the SR-25 FF RAS rail and how $. |
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Posted: 1/19/2016 3:02:14 PM EDT
[#47]
If y'all don't mind, how many of you can report a 100% satisfaction with the Aero M5? I'm in the process of building my third AR, and I've chosen to build a 308 using the M5 as the heart of it all. Having read this entire thread religiously, I've noted that more than a few have issues. I'm now feeling buyer's remorse and praying that my build goes without a hitch on it's first range trip.
Here's what I've ordered so far - Aero M5 Stripped Upper, with dust port Rainier Ultramatch 16" 308 barrel Aero NiB BCG Centurion 14" CMR, 308 I'm planning on ordering an SLR Sentry 7, BCM charging handle, and a Saker QD mount/Flash hider. This will complete my upper, and I'm planning on ordering a complete lower from Aero to avoid LPK and Buffer issues. After reading this thread as well as other material on the web, I now have strong concerns that I've gambled my money on a build that may or may not be reliable. Is there anyone who has had 0 issues with an M5 build from day 1? anyone who had to troubleshoot but now has a rifle that runs 100%? The more issues I read, the more nervous it makes me. I need to hear some Aero M5 success stories to restore my faith. otherwise, I may simply return what I've bought and go back to the drawing board. I initially went with the M5 because of several satisfactory reviews, now I keep reading more and more to the contrary. Really hoping things turn out better than this. |
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Posted: 1/19/2016 3:16:39 PM EDT
[#48]
Quote HistoryQuoted:
That's odd. I've had Zero issues with my Mega barrel from AIM. Are you using an adjustable gas block??? Quote HistoryQuoted:
Quoted:
after talking with AIM, and then backed up by some google searches, looks like Mega 308 barrels are known for super tight chambers which may be causing the resistance giving my FTF and trouble manually extracting That's odd. I've had Zero issues with my Mega barrel from AIM. Are you using an adjustable gas block??? It doesn't even want to chamber an unfired round when manually dropping the BCG. I can start with a cartridge already placed in the chamber and it still requires a full drop of the BCG to go into battery. That places the problem beyond gassing, feed ramps, or magazine fitment. If you search for Mega 308 barrel chamber problems, you will see that they have been inconsistent apparently. Guessing bad batches. AIM said they had to send more than one back. ETA: though to answer your question, yes - Seekins. |
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Posted: 1/19/2016 3:24:03 PM EDT
[#49]
Quote HistoryQuoted:
If y'all don't mind, how many of you can report a 100% satisfaction with the Aero M5? I'm in the process of building my third AR, and I've chosen to build a 308 using the M5 as the heart of it all. Having read this entire thread religiously, I've noted that more than a few have issues. I'm now feeling buyer's remorse and praying that my build goes without a hitch on it's first range trip. snip Really hoping things turn out better than this. I love the way mine looks... When I did shoot it, I wish it shot better with cheaper ammo. Maybe this chamber problem is having some effects on accuracy, but it shouldn't be unreasonable to expect better than 3 MOA @ 100 with less-than-match ammo. If I could go back, I would have done a 308 differently, maybe even just a bolt gun. If I get this resolved, no doubt I will be a believer. One thing you can count on is that, AR 308 fitment and reliability problems aren't exclusive to Aero. |
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Posted: 1/19/2016 3:47:16 PM EDT
[#50]
Quote HistoryI love the way mine looks... When I did shoot it, I wish it shot better with cheaper ammo. Maybe this chamber problem is having some effects on accuracy, but it shouldn't be unreasonable to expect better than 3 MOA @ 100 with less-than-match ammo. If I could go back, I would have done a 308 differently, maybe even just a bolt gun. If I get this resolved, no doubt I will be a believer. One thing you can count on is that, AR 308 fitment and reliability problems aren't exclusive to Aero. This is what kept me away from a 308 AR in the first place. When I started hearing good reviews about the M5 it got my spirits up. I have about two weeks until the parts I ordered are in, and I'll spend that time doing research. If all I find is more horror stories, they'll all be going back home. A real shame because I was very excited about this build. Still hoping to hear from those who've had success, but they seem to be few and far between in this thread. Also, your rifle was shooting worse than 3 MOA with M80 ball type ammo? between that and the chamber issues you mentioned, you sure are going through it. Hope you get it solved and thanks for the advice! |
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