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Posted: 2/28/2021 7:21:52 AM EDT
[#1]
Quote HistoryOriginally Posted By Scott-S6: I might be being dense here but I can't figure out the purpose of the threaded hole on the top of the non-FSB rail. Anyone care to enlighten me? SOPMOD M203 leaf sight.  Attached File |
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USA
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Posted: 2/28/2021 7:31:04 AM EDT
[#2]
Quote HistoryOriginally Posted By Combat_Diver: Would still be wrong as semi and not full auto. Some things just can't be done. If you use a Colt M16A1 registered lower, still won't be 100% as now the markings are wrong. CD A registered receiver could be welded, engraved, machined and refinished. Or an SoT could take a virgin receiver, engrave it correctly and drill the 3rd hole. It still wouldn't be the correct part but it would be mechanically correct and (almost) cosmetically correct. It'd be good if the "this is a true clone and all others are false prophets" types could keep that in mind - we all have to decide what is "good enough" and make compromises to suit. |
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Posted: 2/28/2021 10:21:33 AM EDT
[#3]
Quote HistoryOriginally Posted By Scott-S6: I might be being dense here but I can't figure out the purpose of the threaded hole on the top of the non-FSB rail. Anyone care to enlighten me? I think it’s for mounting a 203 sight. |
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USA
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Posted: 2/28/2021 10:45:23 AM EDT
[Last Edit: Scott-S6]
[#4]
Quote HistoryOriginally Posted By m1afan1000: I think it’s for mounting a 203 sight. Quote HistoryOriginally Posted By m1afan1000: Originally Posted By Scott-S6: I might be being dense here but I can't figure out the purpose of the threaded hole on the top of the non-FSB rail. Anyone care to enlighten me? I think it’s for mounting a 203 sight. Originally Posted By pezboytate: SOPMOD M203 leaf sight. https://www.ar15.com/media/mediaFiles/138579/_20200513_211925_JPG-1844713.JPG Thanks! |
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Posted: 2/28/2021 12:12:44 PM EDT
[#5]
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Posted: 2/28/2021 3:31:40 PM EDT
[#6]
Quote HistoryOriginally Posted By NeedsMoreMausers: Also, are colt patent ambi mag releases kosher/ever seen in the wild? Norgon ambi mag releases have been, idk where the colt patent came from as they are the same thing? |
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VA, USA
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Posted: 2/28/2021 3:51:00 PM EDT
[#7]
Quote HistoryOriginally Posted By LsuJon: Norgon ambi mag releases have been, idk where the colt patent came from as they are the same thing? Whoops I think I did mean the Norgon. I think the Norgon's were used for OEM colt parts sometimes? Just wasnt sure if they were appropriate for a block II Thanks! |
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Posted: 2/28/2021 3:58:00 PM EDT
[#8]
Quote HistoryOriginally Posted By NeedsMoreMausers: Whoops I think I did mean the Norgon. I think the Norgon's were used for OEM colt parts sometimes? Just wasnt sure if they were appropriate for a block II Thanks! |
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OH, USA
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Posted: 2/28/2021 10:35:17 PM EDT
[Last Edit: RobM937]
[#9]
Here's what I've put together after collecting parts over the past 3 years.
Colt M4 complete lower Colt H2 buffer B5 Sopmod (cage code) Colt cage code upper receiver Colt "C" marked BCG DD RIS II Colt M4 14.5" SOCOM barrel Surefire 3P FH p/w by John Thomas @ Retro Arms Works Geissele SSA-E trigger TangoDown Stubby VFG KAC micro rear (200-600m) & front sights PRI Gas Buster CH EOTech EXPS-3 BFG Coyote sling with BFG rail mount Zeroed this gun the other day, and it was definitely a soft shooter. I am guessing the weight of the DD RIS II helps. Adding a Surefire m600 down the road. Huge shout out to John Thomas for his work on the assembly and the pin/weld job. I highly recommend his work to anyone looking to get a pin/weld job done. Pic posted below to see how great of a job he does.    
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Posted: 3/2/2021 12:23:11 AM EDT
[#10]
whats BFG sling ?
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Posted: 3/2/2021 12:37:11 AM EDT
[#11]
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Posted: 3/2/2021 12:12:47 PM EDT
[Last Edit: mdavis]
[#12]
For those in the know, were the MRDS used on the Elcans (Insight, Docter, etc.) generally the 3.5 MOA versions or the larger 7.0 MOA versions? I am just curious which size would be considered "clone correct". Note that even if the smaller MOA versions are correct, I may still go with the higher MOA because my eyes are starting to suck.
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Posted: 3/11/2021 2:42:44 PM EDT
[#13]
Quote HistoryI’ve got to ask about tripods. In the pictures I’ve seen they LOOK like basic camera tripods with an adapter to lock into a rail. In the back of my brain there’s a voice saying “it can’t be that simple.” Does a normal tripod put up with this, or are these special, more rugged tripods? I’ve seen several different types of adapters in photos, but I’ve never seen them advertised - where do you find them? I know it’s only very peripheral to the SOPMOD subject, but they show up often enough that “I gots ta know.” |
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Posted: 3/19/2021 8:21:10 PM EDT
[#14]
Quote HistoryOriginally Posted By GHPorter: I’ve got to ask about tripods. In the pictures I’ve seen they LOOK like basic camera tripods with an adapter to lock into a rail. In the back of my brain there’s a voice saying “it can’t be that simple.” Does a normal tripod put up with this, or are these special, more rugged tripods? I’ve seen several different types of adapters in photos, but I’ve never seen them advertised - where do you find them? I know it’s only very peripheral to the SOPMOD subject, but they show up often enough that “I gots ta know.” Don’t know about those in particular but I have a bog deathgrip and works very good for me |
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Posted: 3/21/2021 3:23:44 PM EDT
[#15]
Just need a mk12 GB to finish rebuilding my upper so if anyone has a lead on one let me know.
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Posted: 3/21/2021 10:55:38 PM EDT
[#16]
Quote HistoryOriginally Posted By RobM937: Here's what I've put together after collecting parts over the past 3 years. Colt M4 complete lower Colt H2 buffer B5 Sopmod (cage code) Colt cage code upper receiver Colt "C" marked BCG DD RIS II Colt M4 14.5" Socom barrel Surefire 3P FH p/w by John Thomas @ Retro Arms Works Geissele SSA-E trigger TangoDown Stubby VFG KAC micro rear (200-600m) & front sights PRI Gas Buster CH EOTech EXPS-3 BFG Coyote sling with BFG rail mount Zeroed this gun the other day, and it was definitely a soft shooter. Adding a Surefire m600 down the road. Huge shout out to John Thomas for his work on the assembly and the pin/weld job. I highly recommend his work to anyone looking to get a pin/weld job done. Pic posted below to see how great of a job he does. https://i.ibb.co/Js5fVh6/IMG-0641.jpg https://i.ibb.co/MkXWkXd/IMG-0642.jpg https://i.ibb.co/yBBYz7d/IMG-0645.jpg https://i.ibb.co/VBQhzQm/IMG-0643.jpg Perseverance, you have it. |
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USA
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Posted: 3/24/2021 11:40:01 AM EDT
[#17]
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Posted: 3/24/2021 11:45:01 AM EDT
[#18]
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Posted: 3/24/2021 2:53:08 PM EDT
[#19]
Quote HistoryOriginally Posted By dempsy1: Don’t know about those in particular but I have a bog deathgrip and works very good for me A local indoor range that offers lots of specialty classes - including precision rifle - posted a video about the basics of tripod shooting.  Precision Shooting | Tips for Shooting Off a Tripod So I have a better idea now, and in particular how this applies to SOPMOD II rifles - it’s about how you stick the rail on the tripod... |
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USA
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Posted: 3/24/2021 2:55:27 PM EDT
[Last Edit: FastCar]
[#20]
Do you guys know if:
The BCM Extractor Spring upgrade kit is needed/ clone correct? |
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USA
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Posted: 3/25/2021 3:27:47 PM EDT
[#21]
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Posted: 3/25/2021 4:01:45 PM EDT
[#22]
Quote HistoryOriginally Posted By FastCar: Do you guys know if: The BCM Extractor Spring upgrade kit is needed/ clone correct? Not needed and not correct. |
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Posted: 3/25/2021 5:15:53 PM EDT
[#23]
I was looking through my parts I’ve gathered for future builds, would a Colt AF with a A1 tear drop forward assist be ok or is it to early for the SOPMOD?
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Posted: 3/25/2021 9:48:47 PM EDT
[#24]
Anybody here actually use the Surefire pressure pad slotted into the full size TD fore grips? Curious how it works in practical shooting. I’m picking up an M600 soon and torn between that and the pressure pad on the 12 o clock rail position.
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Posted: 3/25/2021 9:56:15 PM EDT
[#25]
Quote HistoryOriginally Posted By mstennes: I was looking through my parts I’ve gathered for future builds, would a Colt AF with a A1 tear drop forward assist be ok or is it to early for the SOPMOD? You're good to go. Seen several URGs with tear drop FA. Not common but not rare. CD |
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Posted: 3/26/2021 12:53:48 AM EDT
[Last Edit: mstennes]
[#26]
Quote HistoryOriginally Posted By Combat_Diver: You're good to go. Seen several URGs with tear drop FA. Not common but not rare. CD Quote HistoryOriginally Posted By Combat_Diver: Originally Posted By mstennes: I was looking through my parts I’ve gathered for future builds, would a Colt AF with a A1 tear drop forward assist be ok or is it to early for the SOPMOD? You're good to go. Seen several URGs with tear drop FA. Not common but not rare. CD @Combat_Diver Excellent, then one more question I also have a SOCOM Colt barrel, should I go FSB or non FSB, I have a non FSB DD RIS II here, but I can always sell it and get a FSB DD RIS II. I was planning a NSW REECE at one time but it never gains traction, the M4A1 just seems to my preferred go to. Thank you! |
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Posted: 3/26/2021 1:25:24 AM EDT
[Last Edit: Combat_Diver]
[#27]
Quote HistoryOriginally Posted By mstennes: @Combat_Diver Excellent, then one more question I also have a SOCOM Colt barrel, should I go FSB or non FSB, I have a non FSB DD RIS II here, but I can always sell it and get a FSB DD RIS II. I was planning a NSW REECE at one time but it never gains traction, the M4A1 just seems to my preferred go to. Thank you! Personal preference as both are used. Which is easier for you regarding parts you have. A FSB has to be removed and then reinstalled. IE DD barrel nut added and FSB reattached after RIS II secured. Non FSB requires removal of FSB, dimple bbl, additional Mk12 gas block and folding front sight CD |
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Posted: 3/26/2021 5:06:38 AM EDT
[#28]
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Posted: 3/26/2021 11:46:54 AM EDT
[#29]
Quote HistoryOriginally Posted By Combat_Diver: Personal preference as both are used. Which is easier for you regarding parts you have. A FSB has to be removed and then reinstalled. IE DD barrel nut added and FSB reattached after RIS II secured. Non FSB requires removal of FSB, dimple bbl, additional Mk12 gas block and folding front sight CD Quote HistoryOriginally Posted By Combat_Diver: Originally Posted By mstennes: @Combat_Diver Excellent, then one more question I also have a SOCOM Colt barrel, should I go FSB or non FSB, I have a non FSB DD RIS II here, but I can always sell it and get a FSB DD RIS II. I was planning a NSW REECE at one time but it never gains traction, the M4A1 just seems to my preferred go to. Thank you! Personal preference as both are used. Which is easier for you regarding parts you have. A FSB has to be removed and then reinstalled. IE DD barrel nut added and FSB reattached after RIS II secured. Non FSB requires removal of FSB, dimple bbl, additional Mk12 gas block and folding front sight CD @Combat_Diver I have built both, and I have a new SOCOM Colt barrel, I even have a MK12 gas block dimpling tool so it’s 6 one way half a dozen the other way so to speak. I was just curious as after building quite a few over the years which would be the rarest but still correct setup. It’s never ending lol, after this then I need to address optics, I’m leaning on a ACOG if that’s correct? I have always had a soft spot for them. I’ve used EoTechs and Elcans. While I like the Elcans they have gotten so spendy, and then to get the correct older battery cap models it’s a hurry up and wait or pay through the nose. Thanks again for your awesome help and knowledge! |
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Posted: 3/26/2021 12:00:50 PM EDT
[#30]
Quote HistoryOriginally Posted By mstennes: @Combat_Diver I have built both, and I have a new SOCOM Colt barrel, I even have a MK12 gas block dimpling tool so it’s 6 one way half a dozen the other way so to speak. I was just curious as after building quite a few over the years which would be the rarest but still correct setup. It’s never ending lol, after this then I need to address optics, I’m leaning on a ACOG if that’s correct? I have always had a soft spot for them. I’ve used EoTechs and Elcans. While I like the Elcans they have gotten so spendy, and then to get the correct older battery cap models it’s a hurry up and wait or pay through the nose. Thanks again for your awesome help and knowledge! Elcans were replacing ACOGs when the URG was adopted. Some got the uppers before receiving Elcans. If you are looking for a specific SOF unit, Army SF are the primary users of the FSB RIS II. Other branches used the non FSB RIS II and still do. Only USASOC ODAs got the URGI uppers. CD |
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VA, USA
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Posted: 3/26/2021 12:42:15 PM EDT
[#31]
Alrighty, just about done! All I really need now is a forward QD point, QD point for the sopmod stock, and either a TD stubby or Magpul AFG in FDE (cant decide). I will also likely be putting a FDE modlite OKW on there as well, the only thing I'm really okay deviating away from for correctness-I just love them too much.
 
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Posted: 3/26/2021 1:07:29 PM EDT
[#32]
Quote HistoryOriginally Posted By Combat_Diver: Elcans were replacing ACOGs when the URG was adopted. Some got the uppers before receiving Elcans. If you are looking for a specific SOF unit, Army SF are the primary users of the FSB RIS II. Other branches used the non FSB RIS II and still do. Only USASOC ODAs got the URGI uppers. CD Quote HistoryOriginally Posted By Combat_Diver: Originally Posted By mstennes: @Combat_Diver I have built both, and I have a new SOCOM Colt barrel, I even have a MK12 gas block dimpling tool so it’s 6 one way half a dozen the other way so to speak. I was just curious as after building quite a few over the years which would be the rarest but still correct setup. It’s never ending lol, after this then I need to address optics, I’m leaning on a ACOG if that’s correct? I have always had a soft spot for them. I’ve used EoTechs and Elcans. While I like the Elcans they have gotten so spendy, and then to get the correct older battery cap models it’s a hurry up and wait or pay through the nose. Thanks again for your awesome help and knowledge! Elcans were replacing ACOGs when the URG was adopted. Some got the uppers before receiving Elcans. If you are looking for a specific SOF unit, Army SF are the primary users of the FSB RIS II. Other branches used the non FSB RIS II and still do. Only USASOC ODAs got the URGI uppers. CD @Combat_Diver First off thanks again! I’m not really at this point going for a specific unit issue, unit purchase or user private purchaser, I have built a number of both over the years and sold them wanting to go another way, but be correct. What this will be is one I’m planning on keeping, yet in the same breath have one that while correct, is or has been in the wild and also rarer and different if that makes sense? Sort of my last build for me, quitting on a high point. Thanks again! |
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Posted: 3/26/2021 2:16:26 PM EDT
[#33]
Quote HistoryOriginally Posted By @Virginia_Shooter: Anybody here actually use the Surefire pressure pad slotted into the full size TD fore grips? Curious how it works in practical shooting. I'm picking up an M600 soon and torn between that and the pressure pad on the 12 o clock rail position. I have! The convenience comes at a slight cost... It takes a good squeeze to turn the light on (the tape switch sorta balloons as it's installed) and there's not a lot of leverage in your palm or lower fingers. Worth trying but I'll take a rail mounted switch or hot button instead. |
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AZ, USA
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Posted: 3/26/2021 5:01:27 PM EDT
[#34]
Mark 6 has brought new life into this upper. Now I just need a T2 for it.
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Posted: 3/26/2021 6:49:06 PM EDT
[#35]
Quote HistoryOriginally Posted By rcfallen: Mark 6 has brought new life into this upper. Now I just need a T2 for it. https://live.staticflickr.com/65535/51074513167_1943eee9de_h.jpg |
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Posted: 3/26/2021 7:51:01 PM EDT
[#36]
Quote HistoryOriginally Posted By rcfallen: Mark 6 has brought new life into this upper. Now I just need a T2 for it. https://live.staticflickr.com/65535/51074513167_1943eee9de_h.jpg Fill me in on the gadget your Mark 6 is looking though. Thermal, IR, other? |
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Posted: 3/26/2021 8:15:09 PM EDT
[#37]
Badger Mk12 gas blocks in stock at Operation Parts.
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Posted: 3/26/2021 11:06:40 PM EDT
[#38]
Quote HistoryOriginally Posted By mstennes: @Combat_Diver First off thanks again! I’m not really at this point going for a specific unit issue, unit purchase or user private purchaser, I have built a number of both over the years and sold them wanting to go another way, but be correct. What this will be is one I’m planning on keeping, yet in the same breath have one that while correct, is or has been in the wild and also rarer and different if that makes sense? Sort of my last build for me, quitting on a high point. Thanks again! Rare would be to get one of the RIS II that mounts a M203. They were never fielded as the M203 was phased out for the M320, which was used as a standalone. CD |
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Posted: 3/26/2021 11:20:15 PM EDT
[#39]
Quote HistoryOriginally Posted By Combat_Diver: Rare would be to get one of the RIS II that mounts a M203. They were never fielded as the M203 was phased out for the M320, which was used as a standalone. CD |
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USA
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Posted: 3/26/2021 11:29:19 PM EDT
[#40]
All of the RIS II rails except for the MK18 rails can mount the M203. Only MARSOC really used M203s on Block II M4s in any real numbers.
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GA, USA
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Posted: 3/26/2021 11:52:02 PM EDT
[#41]
@Combat_Diver
Do all the Colt 14.5 gov profile barrels in the supply chain start out with an FSB, regardless of what they're eventually used for/built into, or do you have some gov barrels that start out stripped and haven't ever been drilled for FSB pins? |
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Posted: 3/27/2021 2:23:49 AM EDT
[#42]
Quote HistoryOriginally Posted By StealthGuy: All of the RIS II rails except for the MK18 rails can mount the M203. Only MARSOC really used M203s on Block II M4s in any real numbers. You are correct. Just M203 rarely mounted thats what I meant. CD |
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Posted: 3/27/2021 2:24:59 AM EDT
[#43]
Quote HistoryOriginally Posted By DiscipulusArmorum: @Combat_Diver Do all the Colt 14.5 gov profile barrels in the supply chain start out with an FSB, regardless of what they're eventually used for/built into, or do you have some gov barrels that start out stripped and haven't ever been drilled for FSB pins? As far as I know that is correct. Crane removed the FSB and dimpled the barrel for the Mk12 gas block set screws. CD |
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Posted: 3/27/2021 10:12:32 AM EDT
[#44]
Quote HistoryOriginally Posted By pezboytate: Badger Mk12 gas blocks in stock at Operation Parts. Midway and Brownell's too. |
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TX, USA
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Posted: 3/27/2021 5:50:44 PM EDT
[#45]
I know the TA31F has been seen on the block ii but has it been seen in any mounts besides a TA51? Is it ever issued with a QD mount on any rifle?
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CA, USA
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Posted: 3/28/2021 1:54:48 PM EDT
[Last Edit: TheBrokePilot]
[#46]
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USA
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Posted: 3/29/2021 10:25:28 PM EDT
[#47]
As of right now, KFarmory in Alpharetta GA
Has NT4 in FDE Available. I have no affiliation with them. |
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Posted: 3/30/2021 10:41:11 AM EDT
[#48]
Without going through how many pages, how can I get one of the improved DD RIS barrel nut wrenches?
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CA, USA
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Posted: 3/30/2021 11:10:01 AM EDT
[#49]
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Posted: 3/30/2021 11:22:41 AM EDT
[#50]
Quote HistoryOriginally Posted By TheBrokePilot: Classified Defense RIS II wrench +1 Also check out his rail alignment vise tool makes rail installation a breeze. |
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