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Posted: 4/2/2024 2:15:13 AM EDT
[Last Edit: fadedsun]
[#1]
Quote HistoryOriginally Posted By djkest: Optics Planet has a good deal on these right now: https://www.opticsplanet.com/aero-precision-ar15-assembled-upper-receiver-no-forward-assist.html?_iv_code=29D-UPR-AR15AURNFA-APAR610401AC That’s where I bought it from. I don’t know if I’ll actually receive it. Who knows. Any good options for a hand guard? |
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Posted: 4/2/2024 12:23:26 PM EDT
[Last Edit: djkest]
[#2]
Quote HistoryOriginally Posted By fadedsun: That’s where I bought it from. I don’t know if I’ll actually receive it. Who knows. Any good options for a hand guard? The Fostec rails are the lightest right now, especially the 10" "tungsten" one which tends to be a bit longer. I'd love to get my hands on one and take pictures of / weigh the nut. The list on page 1 is pretty up-to-date. Midwest Industries Ultra Lightweight $$ V7 Systems Hyperlite $$$ Aero Precision Atlas-One M-Lok |
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PA, USA
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Posted: 4/2/2024 2:34:25 PM EDT
[Last Edit: RangeToy]
[#3]
Quote HistoryOriginally Posted By djkest: The Fostec rails are the lightest right now, especially the 10" "tungsten" one which tends to be a bit longer. I'd love to get my hands on one and take pictures of / weigh the nut. The list on page 1 is pretty up-to-date. Midwest Industries Ultra Lightweight $$ V7 Systems Hyperlite $$$ Aero Precision Atlas-One M-Lok I'm running the 12.6" MI rail on the 14.5" pin & weld build I recently finished. No complaints. Thinking about trying the Odin Works O2 lite rail on the next build, but now that I see the Fostec handguard, I might have to go that route |
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Posted: 4/3/2024 1:55:39 AM EDT
[Last Edit: fadedsun]
[#4]
Quote HistoryOriginally Posted By djkest: The Fostec rails are the lightest right now, especially the 10" "tungsten" one which tends to be a bit longer. I'd love to get my hands on one and take pictures of / weigh the nut. The list on page 1 is pretty up-to-date. Midwest Industries Ultra Lightweight $$ V7 Systems Hyperlite $$$ Aero Precision Atlas-One M-Lok Something else to add to the list: Samson low profile gas block-.61 oz That's a MFG supplied number but when mine arrives I'll get you a user supplied number with a photo to back it up. It's the Lightest one I have seen so far and about a tenth of an ounce lighter than the V7. https://www.mountsplus.com/625-low-profile-gas-block-samson-lightweight-ar15-gas-block.html The Aero atlas one seems to be the best combination of price, length, and weight. about 13 ounces for the complete setup. I'll go with that. What is the measurement used for weighing a rifle? Ready to shoot with optics, BUIS? no optic/BUIS? |
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FL, USA
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Posted: 4/3/2024 6:39:54 AM EDT
[#5]
Personally I feel the base weight measurement should be with no accessories. No sights, sling,mag etc. that way we can compare weights without figuring out the difference in the add ons.
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Posted: 4/3/2024 12:40:53 PM EDT
[#6]
Quote HistoryOriginally Posted By fadedsun: Something else to add to the list: Samson low profile gas block-.61 oz That's a MFG supplied number but when mine arrives I'll get you a user supplied number with a photo to back it up. It's the Lightest one I have seen so far and about a tenth of an ounce lighter than the V7. https://www.mountsplus.com/625-low-profile-gas-block-samson-lightweight-ar15-gas-block.html The Aero atlas one seems to be the best combination of price, length, and weight. about 13 ounces for the complete setup. I'll go with that. What is the measurement used for weighing a rifle? Ready to shoot with optics, BUIS? no optic/BUIS? The Under 6 thread has specific requirements in the OP. |
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Posted: 4/6/2024 4:58:57 PM EDT
[Last Edit: Slimjim]
[#7]
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FL, USA
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Posted: 4/6/2024 5:01:16 PM EDT
[Last Edit: larrys]
[#8]
FWIW the Smoke Composite 10” handguard is 5.243 oz if you ask them to give you the lightened version. That is a confirmed U weight.
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Posted: 4/6/2024 5:57:46 PM EDT
[Last Edit: tortilla-flats]
[#9]
Quote HistoryOriginally Posted By fadedsun: That's where I bought it from. I don't know if I'll actually receive it. Who knows. Any good options for a hand guard? I've bought from Optics Planet lately without an issue. But I make sure it's clear on their website its in stock. Also, free shipping is sloowww. |
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Posted: 4/8/2024 2:34:07 AM EDT
[#10]
Quote HistoryOriginally Posted By tortilla-flats: I've bought from Optics Planet lately without an issue. But I make sure it's clear on their website its in stock. Also, free shipping is sloowww. I ordered my stuff on the 1st and it still hasn't arrived. Yeah, super slow. |
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Posted: 4/8/2024 2:53:47 AM EDT
[#11]
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Posted: 4/8/2024 10:44:08 AM EDT
[#12]
Quote HistoryThat part is so light that your scale lacks the precision to measure it properly. Still, that's good news. I'd love to get my hands on the KAK mini-milspec and the LWRC UCIW buffer tubes to see how much they weigh. Might be a good option for some folks, only issue is that they have proprietary buffer systems to deal with the shorter length. |
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Posted: 4/8/2024 1:23:48 PM EDT
[#13]
Quote HistoryOriginally Posted By djkest: That part is so light that your scale lacks the precision to measure it properly. Still, that's good news. I'd love to get my hands on the KAK mini-milspec and the LWRC UCIW buffer tubes to see how much they weigh. Might be a good option for some folks, only issue is that they have proprietary buffer systems to deal with the shorter length. Quote HistoryOriginally Posted By djkest: That part is so light that your scale lacks the precision to measure it properly. Still, that's good news. I'd love to get my hands on the KAK mini-milspec and the LWRC UCIW buffer tubes to see how much they weigh. Might be a good option for some folks, only issue is that they have proprietary buffer systems to deal with the shorter length. Lose more weight taking the weights out of the buffer itself & turning down the gas. One of the least expensive routes to lose weight on an AR, albeit & the expense of some reliability, some of which can be mitigated by turning the gas back up as needed. |
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Posted: 4/11/2024 11:26:02 AM EDT
[#14]
New weights
 ALG ACT Trigger 72 grams / 2.5 oz Geiselle SD-C Trigger 63 grams / 2.2 oz Not a cheap way to lose 9 grams |
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Posted: 4/14/2024 10:50:09 AM EDT
[#15]
Looks like Aero Precision may be discontinuing their "No-FA" upper receivers, which sucks because they were one of the few companies that still made them. I just picked up one from Primary Arms while they are still around.
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Posted: 4/14/2024 11:06:48 AM EDT
[#16]
Quote HistoryOriginally Posted By djkest: Looks like Aero Precision may be discontinuing their "No-FA" upper receivers, which sucks because they were one of the few companies that still made them. I just picked up one from Primary Arms while they are still around. Ouch. Those uppers are nice. Source? |
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Posted: 4/14/2024 11:19:32 AM EDT
[#17]
Quote HistoryOriginally Posted By fadedsun: Ouch. Those uppers are nice. Source? https://www.aeroprecisionusa.com/ar15-assembled-upper-receiver-no-fa Marked as discontinued. |
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OR, USA
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Posted: 4/14/2024 2:34:52 PM EDT
[#18]
Quote HistoryOriginally Posted By djkest: That part is so light that your scale lacks the precision to measure it properly. Still, that's good news. I'd love to get my hands on the KAK mini-milspec and the LWRC UCIW buffer tubes to see how much they weigh. Might be a good option for some folks, only issue is that they have proprietary buffer systems to deal with the shorter length. Quote HistoryOriginally Posted By djkest: That part is so light that your scale lacks the precision to measure it properly. Still, that's good news. I'd love to get my hands on the KAK mini-milspec and the LWRC UCIW buffer tubes to see how much they weigh. Might be a good option for some folks, only issue is that they have proprietary buffer systems to deal with the shorter length. It's easy to test. Weigh a nickel, should be 5 grams, add another nickel, 10 grams... |
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CA, USA
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Posted: 4/14/2024 7:09:55 PM EDT
[Last Edit: C_1]
[#19]
Quote HistoryOriginally Posted By djkest: That part is so light that your scale lacks the precision to measure it properly. Still, that's good news. I'd love to get my hands on the KAK mini-milspec and the LWRC UCIW buffer tubes to see how much they weigh. Might be a good option for some folks, only issue is that they have proprietary buffer systems to deal with the shorter length. I recently emailed KAK and they said their KAK Mini Mil Spec Buffer Tube Kit with carbine buffer weighs 8.3 oz. And IIRC, I read somewhere that the LWRC UICW buffer tube kit (w/o stock) weighs 9.1 oz. |
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Posted: 4/15/2024 9:59:12 AM EDT
[Last Edit: djkest]
[#20]
Quote HistoryOriginally Posted By C_1: I recently emailed KAK and they said their KAK Mini Mil Spec Buffer Tube Kit with carbine buffer weighs 8.3 oz. And IIRC, I read somewhere that the LWRC UICW buffer tube kit (w/o stock) weighs 9.1 oz. That sounds pretty good. Buffer Tube Buffer Castle Nut End Plate Buffer Spring I recently received another Aero Precision No FA upper and it was 0.1 oz less than my last one. 6.4 oz. I suspect the cerakote versions are slightly heavier due to coating thickness. |
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Posted: 4/15/2024 12:25:04 PM EDT
[#21]
Quote HistoryOriginally Posted By fadedsun: Ouch. Those uppers are nice. Source? Primary Arms had a bunch, Aero has some still, mostly in black. |
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Posted: 4/18/2024 9:43:47 PM EDT
[Last Edit: djkest]
[#22]
Good news on the KAK Mini-Milspec.
MILSPEC Carbine system: Buffer: 3.0 Oz Spring: 1.9 Oz Buffer Tube: 3.9 Oz System weight: 8.8 Oz KAK Mini-Milspec: Buffer: 2.5 Spring: 1.4 Buffer Tube: 3.1 Oz System Weight: 7 Oz SO you can save 1.8 Oz for $60 by switching over to the KAK mini-milspec. The only big disadvantage is that you have less LOP, but that might not even be an issue for you. Parts seem to be good quality, maybe not "super premium" but still good milspec quality. |
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TX, USA
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Posted: 4/19/2024 8:42:06 AM EDT
[Last Edit: DevL]
[#23]
Quote HistoryOriginally Posted By C_1: I recently emailed KAK and they said their KAK Mini Mil Spec Buffer Tube Kit with carbine buffer weighs 8.3 oz. And IIRC, I read somewhere that the LWRC UICW buffer tube kit (w/o stock) weighs 9.1 oz. The LWRC buffer has tungsten weights in the buffer and weighs between the standard and H1 buffer. You could swap in steel weights if you want to cut some weight off the LWRC 2 weight buffer. The KAK is 1 weight buffer and gets length from the endcap. Personally, I prefer some rear weight to balance a rifle vs all out lightweight. It just handles better. And isn't the point of building an ultralight rifle supposed to be about handling? |
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TX, USA
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Posted: 4/19/2024 8:59:01 AM EDT
[#24]
Quote HistoryOriginally Posted By C_1: I recently emailed KAK and they said their KAK Mini Mil Spec Buffer Tube Kit with carbine buffer weighs 8.3 oz. And IIRC, I read somewhere that the LWRC UICW buffer tube kit (w/o stock) weighs 9.1 oz. But that includes castle nut and end plate I believe. |
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Posted: 4/19/2024 9:43:27 AM EDT
[#25]
Quote HistoryOriginally Posted By DevL: The LWRC buffer has tungsten weights in the buffer and weighs between the standard and H1 buffer. You could swap in steel weights if you want to cut some weight off the LWRC 2 weight buffer. The KAK is 1 weight buffer and gets length from the endcap. Personally, I prefer some rear weight to balance a rifle vs all out lightweight. It just handles better. And isn't the point of building an ultralight rifle supposed to be about handling? Quote HistoryOriginally Posted By DevL: Originally Posted By C_1: I recently emailed KAK and they said their KAK Mini Mil Spec Buffer Tube Kit with carbine buffer weighs 8.3 oz. And IIRC, I read somewhere that the LWRC UICW buffer tube kit (w/o stock) weighs 9.1 oz. The LWRC buffer has tungsten weights in the buffer and weighs between the standard and H1 buffer. You could swap in steel weights if you want to cut some weight off the LWRC 2 weight buffer. The KAK is 1 weight buffer and gets length from the endcap. Personally, I prefer some rear weight to balance a rifle vs all out lightweight. It just handles better. And isn't the point of building an ultralight rifle supposed to be about handling? You're thinking of "a balanced rifle". Balanced rifles are about handling. Ultra-lightweight rifles are extremely handy to carry around, sometimes at the sacrifice of handling & other qualities. Everything is a compromise - pick yours. |
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Posted: 4/19/2024 9:45:14 AM EDT
[#26]
Quote HistoryOriginally Posted By DevL: But that includes castle nut and end plate I believe. Correct. By my scale, Castle Nut + Endplate = 1.2 Oz So I got 8.2 oz for the full KAK set. |
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Posted: 4/19/2024 9:49:09 AM EDT
[#27]
KAK parts are a lot more expensive than:
1) Pull the weights from your existing buffer; 2) Turn down the gas. You will save some weight on the tube, buffer shell, & spring over standard carbine components. |
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Posted: 4/19/2024 11:08:46 PM EDT
[Last Edit: J_taylor]
[#28]
Does anyone have a list of Lower reciever weights ? I'm building a lightweight Takedown AR. I'm thinking of using a H&R XM16E1 or a 601 Lower reciever.
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Posted: 4/20/2024 1:21:30 AM EDT
[#29]
Quote HistoryOriginally Posted By J_taylor: Does anyone have a list of Lower reciever weights ? I'm building a lightweight Takedown AR. I'm thinking of using a H&R XM16E1 or a 601 Lower reciever. https://www.ar15.com/media/mediaFiles/548798/1000011620_jpg-3192932.JPG There's quite a few on the first page and in the spreadsheet. |
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Posted: 4/20/2024 11:29:51 AM EDT
[#30]
Quote HistoryOriginally Posted By RangeToy: I'm running the 12.6" MI rail on the 14.5" pin & weld build I recently finished. No complaints. Thinking about trying the Odin Works O2 lite rail on the next build, but now that I see the Fostec handguard, I might have to go that route That's actually a great size combo. |
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Posted: 4/20/2024 8:06:54 PM EDT
[#31]
Well look at this. I've been sorting through some stuff and decided to check out some things...
Lower: H&R M16A1 factory complete: 1lb, 13.75oz Upper: Colt 6720* complete: 3lbs, 6.50oz TOTAL: 5lbs, 4.25oz Not a bad start for just slapping together an upper & lower I had laying around. (no sights/optics) * Upper config... -- Colt M4 upper receiver w/Colt FA BCG & CH -- Colt 6720 16" pencil barrel w/A1 FH; ADCO shaved the FSB -- MI 10.5" Ultralightweight rail |
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