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Posted: 6/29/2021 4:11:11 PM EDT
[#1]
Quote HistoryOriginally Posted By HighpowerRifleBrony: With grenade launcher, laser, light, sling, cleaning kit, stock pouch, etc, what's the heaviest these can get? @HighpowerRifleBrony Well, An M16A4 with an ACOG, M203, leaf sight, M962, PEQ-2A, BFG sling, loaded mag is right at 14 lbs Plus however much a cleaning kit, rail covers, pressure switches, etc. weighs. Might as well add a 1 lb bayonet too. |
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Posted: 6/29/2021 4:15:21 PM EDT
[#2]
Quote HistoryOriginally Posted By Dyzastr: Is the rco a4 correct for marines? What era/branch would a TA01 go on? Now I gotta pull the trigger on a barrel. I found an upper for a good price with a 20" rifle length, FN button rifled barrel. I'm considering getting it to pull the barrel. Are the button rifled barrels fn barrels correct in any way? eta: https://www.ar15.com/media/mediaFiles/471387/C65041DB-E33D-4DF0-93C0-83A56BC124A7_jpe-1995851.JPG https://www.ar15.com/media/mediaFiles/471387/83AC72F9-0995-408A-AC3A-092CF6A882B6_jpe-1995852.JPG FN AR15 premium button rifled barrels are are manufactured using U.S. sourced Chrome Moly Venadium material per Mil-B-11595E. Each barrel is High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI) to ensure that it is free of microstresses or flaws, resulting in consistency and quality in every barrel shipped from the factory. The bore and chamber are chrome lined to help resist corrosion and provide resistance to heat erosion which greatly improves barrel life and reliable chambering / extraction. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. Currently available in a chambering of 5.56 x 45mm in the following profiles and gas system lengths 10.5" Government Carbine, 14.7" Government Midlength, 14.7" M4 Carbine, 16" M4 Carbine, 16" Government Carbine, 16" Government Midlength, 18" Government Rifle, 20" Government Rifle. TA01NSN was SOPMOD issue. Army might have bought some TA01NSNs COTS in the 2000s before the M150 was adopted. but the most common was the TA31F. That's a commercial FN barrel. Not clone correct just because of the M4 feedramps and the profile at the end but it's pretty close and is likely a good barrel. |
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Posted: 6/29/2021 4:35:29 PM EDT
[Last Edit: Dyzastr]
[#3]
Quote HistoryOriginally Posted By pezboytate: TA01NSN was SOPMOD issue. Army might have bought some TA01NSNs COTS in the 2000s before the M150 was adopted. but the most common was the TA31F. That's a commercial FN barrel. Not clone correct just because of the M4 feedramps and the profile at the end but it's pretty close and is likely a good barrel. Quote HistoryOriginally Posted By pezboytate: Originally Posted By Dyzastr: Is the rco a4 correct for marines? What era/branch would a TA01 go on? Now I gotta pull the trigger on a barrel. I found an upper for a good price with a 20" rifle length, FN button rifled barrel. I'm considering getting it to pull the barrel. Are the button rifled barrels fn barrels correct in any way? eta: https://www.ar15.com/media/mediaFiles/471387/C65041DB-E33D-4DF0-93C0-83A56BC124A7_jpe-1995851.JPG https://www.ar15.com/media/mediaFiles/471387/83AC72F9-0995-408A-AC3A-092CF6A882B6_jpe-1995852.JPG FN AR15 premium button rifled barrels are are manufactured using U.S. sourced Chrome Moly Venadium material per Mil-B-11595E. Each barrel is High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI) to ensure that it is free of microstresses or flaws, resulting in consistency and quality in every barrel shipped from the factory. The bore and chamber are chrome lined to help resist corrosion and provide resistance to heat erosion which greatly improves barrel life and reliable chambering / extraction. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. Currently available in a chambering of 5.56 x 45mm in the following profiles and gas system lengths 10.5" Government Carbine, 14.7" Government Midlength, 14.7" M4 Carbine, 16" M4 Carbine, 16" Government Carbine, 16" Government Midlength, 18" Government Rifle, 20" Government Rifle. TA01NSN was SOPMOD issue. Army might have bought some TA01NSNs COTS in the 2000s before the M150 was adopted. but the most common was the TA31F. That's a commercial FN barrel. Not clone correct just because of the M4 feedramps and the profile at the end but it's pretty close and is likely a good barrel. |
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Posted: 6/29/2021 4:37:51 PM EDT
[#4]
Quote HistoryOriginally Posted By Dyzastr: Thanks for the info on the barrel. Are m4 ramps correct for any m16a4? I read on the first page that they were gtg? Nope. Started as an AR15A4 thing. Not sure where that's coming from. |
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Posted: 6/29/2021 4:41:13 PM EDT
[#5]
Quote HistoryOriginally Posted By pezboytate: Nope. Started as an AR15A4 thing. Not sure where that's coming from. So would I need m4 upper with m16 ramps? Or rifle/m16 upper, with m16 ramps? Or are both correct at different times/branches? Oh, and what should the profile be? Sorry for all the questions. I thought I knew what I was doing with piecing one together, but now I'm not sure |
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Posted: 6/29/2021 4:47:40 PM EDT
[Last Edit: Dyzastr]
[#6]
Maybe it was changed in a later post, but this is from post 1 on the first page:
“What I like to call... "The War Years"...doesn't have so much to do with any particular "war" per se, but is basically from @ 2000 - 2010(ish) These M16A4s are noted by their use of: True A4 barrel assemblies having "M4" feed ramped barrel extensions & "F"-marked (detachable carry handle height) front sight bases. Flat top "M" or "M4" marked upper receivers incorporating "M4" feed ramps.” This is the source of my confusion. |
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Posted: 6/29/2021 4:52:09 PM EDT
[#7]
Quote HistoryOriginally Posted By Dyzastr: Nice! Looks good! Is the m150 correct/calibrated for the m4? I believe they say it's calibrated for A4 and M4 but the TA31RCOA4 in the clone correct model. |
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Posted: 6/29/2021 4:53:53 PM EDT
[#8]
Quote HistoryOriginally Posted By Dyzastr: So would I need m4 upper with m16 ramps? Or rifle/m16 upper, with m16 ramps? Or are both correct at different times/branches? Oh, and what should the profile be? Sorry for all the questions. I thought I knew what I was doing with piecing one together, but now I'm not sure There was a bunch of legit FN surplus ones available, maybe there's still a few floating around. Depends how correct you want to be but you would want an era correct upper receiver without M4 feedramps, an era correct barrel without feedramps and with an F marked FSB. I haven't seen any evidence of M4 upper receivers or barrels with M4 feedramps being issued. I personally have a Colt AR15A4 URG but it's not a clone. It doesn't hurt function to have them, just not correct. The positive is you can't see them from the outside. The FN CHF barrels are nice as well and arguably better than issued, just not correct. This is what an A4 barrel looks like:  Attached File |
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Posted: 6/29/2021 4:55:23 PM EDT
[#9]
Quote HistoryOriginally Posted By Dyzastr: Maybe it was changed in a later post, but this is from post 1 on the first page: “What I like to call... "The War Years"...doesn't have so much to do with any particular "war" per se, but is basically from @ 2000 - 2010(ish) These M16A4s are noted by their use of: True A4 barrel assemblies having "M4" feed ramped barrel extensions & "F"-marked (detachable carry handle height) front sight bases. Flat top "M" or "M4" marked upper receivers incorporating "M4" feed ramps.” This is the source of my confusion. I just skimmed through it, I don't know where he's getting that from since those new surplus uppers don't have M4 feedramps. We had Colt M16A4s in the mid 2000s and they didn't have M4 feedramps. |
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Posted: 6/29/2021 4:55:57 PM EDT
[#10]
Quote HistoryOriginally Posted By officerX: I believe they say it's calibrated for A4 and M4 but the TA31RCOA4 in the clone correct model. USMC only. The M150 is the exact same reticle as the RCO-M4. |
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Posted: 6/29/2021 5:34:53 PM EDT
[#11]
Quote HistoryOriginally Posted By pezboytate: I just skimmed through it, I don't know where he's getting that from since those new surplus uppers don't have M4 feedramps. We had Colt M16A4s in the mid 2000s and they didn't have M4 feedramps. so it looks like the fn barrel with their cage code is the one I'm looking for. |
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Posted: 6/29/2021 5:38:44 PM EDT
[#12]
Looks like 1 USGI URG on GunBroker for $1K.
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Posted: 6/29/2021 9:59:58 PM EDT
[Last Edit: Dyzastr]
[#13]
Quote HistoryOriginally Posted By pezboytate: Looks like 1 USGI URG on GunBroker for $1K. Thanks again for clearing that info up. That info on the first page really threw me off. I’d rather get as close to correct to start with because I know down the line I’ll be swapping parts out for more correct ones if I don’t. |
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LA, USA
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Posted: 6/29/2021 10:52:01 PM EDT
[#14]
Quote HistoryOriginally Posted By Dyzastr: I was checking that one out. I may hold out for an ee deal and save a few hundred. Now that I'm looking, I'll prob won't see any for a while. That always seems to happen. Thanks again for clearing that info up. That info on the first page really threw me off. I’d rather get as close to correct to start with because I know down the line I’ll be swapping parts out for more correct ones if I don’t. There’s no way I’d pay $1,135 for an A4 upper receiver assembly, let alone one with no BCG or charging handle. |
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Posted: 6/30/2021 12:58:52 AM EDT
[Last Edit: Combat_Diver]
[#15]
M16A3/A4 upper receiver has rifle ramps and barreled assembly has rifle ramp barrel extension. Different NSNs between M16AA3/4 (1005-01-454-9880) and M4/M4A1 (1005-01-382-6795) uppers. Barrels between M16A2 (1005-01-146-7684) and M16A4 (1005-01-454-1629) are also different NSNs which I would assume to be the F marked FSB for the M16A3/A4.
Note: Somewhere the M16A3 moved from fixed A2 upper to A4 flat top. FCG is still full auto instead of burst. Only ones I've ever came across belong to the SEABEEs early in Iraq 04' that had A2 carrying handle uppers. Source: TM 9-1005-319-23&P November 2008 Armory builds  Attached File Attached FileCD |
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Posted: 7/1/2021 12:39:58 PM EDT
[#16]
Quote HistoryOriginally Posted By 86HMMWV: There's no way I'd pay $1,135 for an A4 upper receiver assembly, let alone one with no BCG or charging handle. Quote HistoryOriginally Posted By 86HMMWV: Originally Posted By Dyzastr: I was checking that one out. I may hold out for an ee deal and save a few hundred. Now that I'm looking, I'll prob won't see any for a while. That always seems to happen. Thanks again for clearing that info up. That info on the first page really threw me off. I'd rather get as close to correct to start with because I know down the line I'll be swapping parts out for more correct ones if I don't. There's no way I'd pay $1,135 for an A4 upper receiver assembly, let alone one with no BCG or charging handle. |
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Posted: 7/1/2021 2:58:07 PM EDT
[Last Edit: Dyzastr]
[#17]
Quote HistoryOriginally Posted By Combat_Diver: M16A3/A4 upper receiver has rifle ramps and barreled assembly has rifle ramp barrel extension. Different NSNs between M16AA3/4 (1005-01-454-9880) and M4/M4A1 (1005-01-382-6795) uppers. Barrels between M16A2 (1005-01-146-7684) and M16A4 (1005-01-454-1629) are also different NSNs which I would assume to be the F marked FSB for the M16A3/A4. Note: Somewhere the M16A3 moved from fixed A2 upper to A4 flat top. FCG is still full auto instead of burst. Only ones I've ever came across belong to the SEABEEs early in Iraq 04' that had A2 carrying handle uppers. Source: TM 9-1005-319-23&P November 2008 Armory builds https://www.ar15.com/media/mediaFiles/32677/IMG_1888_JPG-1996453.JPG https://www.ar15.com/media/mediaFiles/32677/IMG_1889_JPG-1996454.JPG CD Eta- here is an example of one with the ris style numbering.  Attached File |
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Posted: 7/1/2021 3:27:45 PM EDT
[#18]
Quote HistoryOriginally Posted By Dyzastr: Thanks for the info. Did the A4's happen to have a standard m5 ras, or have you happen to see any of the navy m5 ras' with odd number ris style t-marks with a locking lower portion? I came across some navy m5 ras, like what I described, and just wondered if you could verify their use? Eta- here is an example of one with the ris style numbering. https://www.ar15.com/media/mediaFiles/471387/FDC27730-9D24-4C95-87D7-89771FA2B9E1_jpe-1998150.JPG Those uppers were built back in 16’. While we did have Navy, they were SEAL support there. The M16s on hand then belonged to MARSOC. Don’t remember the numbering CD |
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Posted: 7/1/2021 4:09:59 PM EDT
[#19]
My daughter a few months ago. I need to get her back out.
 Attached File |
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Posted: 7/5/2021 8:41:19 PM EDT
[Last Edit: Sn8kplissken]
[#20]
Why is it so hard to come across m16 barrels seems to be non existent finding barrels for these
The last couple years ever since I joined I’ve only have seen a handful for sale |
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Posted: 7/5/2021 10:36:45 PM EDT
[#21]
Quote HistoryOriginally Posted By Sn8kplissken: Why is it so hard to come across m16 barrels seems to be non existent finding barrels for these The last couple years ever since I joined I’ve only have seen a handful for sale You are missing them. It happens to the best of us..... |
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Posted: 7/6/2021 9:42:04 AM EDT
[Last Edit: Sn8kplissken]
[#22]
I get email notifications on every ad that I’m subscribed too lol I look daily if I have been missing out please show me we’re .
 We’re these easier to find back in the day ? I am a newer member they definitely don’t pop up like 14.5 colt barrels do |
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Posted: 7/25/2021 5:32:47 PM EDT
[Last Edit: Dyzastr]
[#23]
Man, I shoulda jumped when I had the chance. Missed a complete colt m16a4 upper in the EE for an awesome price too. Stupid me.
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Posted: 7/25/2021 9:12:49 PM EDT
[Last Edit: EggyMean]
[#24]
(Edited)
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ID, USA
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Posted: 8/3/2021 5:47:34 PM EDT
[#25]
Has anyone ever seen an SDO/TA11 on a USMC M16A4? I'm committed to the USMC clone but God I hate the RCO eye relief
I'll do it if it's the only correct thing though, and I suspect it is. 
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Posted: 8/3/2021 11:06:20 PM EDT
[Last Edit: Sn8kplissken]
[#26]
As far as my knowledge they only ran the 4x32s never seen a pic in the wild of a ta11.
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MI, USA
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Posted: 8/3/2021 11:15:42 PM EDT
[#27]
Quote HistoryOriginally Posted By FriendlyLocalYugo: Has anyone ever seen an SDO/TA11 on a USMC M16A4? I'm committed to the USMC clone but God I hate the RCO eye relief I'll do it if it's the only correct thing though, and I suspect it is. Brownells has the Cav Arms A1 stock for sale. The buttplate is horrid dog$hit but the shell is usable. Swap the buttplate of your A2 stock onto the A1 shell, put it on, and tell me you can see the difference. I was in the same boat after coming back from the range with my former "S-DMR-ish" clone and those 5/8" are hardly missed visually. |
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Posted: 8/4/2021 8:30:20 AM EDT
[#28]
I’ve noticed having shorter arms it’s not very comfortable reaching to get that eye relief on the Acog like your saying you could go A1 stock, no rear buis run Acog as far back as possible, or get the larue rco Acog mount
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MI, USA
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Posted: 8/4/2021 6:18:23 PM EDT
[#29]
Other option is to get a Vltor A5 kit and install that on the lower. Technically never deployed but it was proposed iirc and looks just as milspec.
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IN, USA
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Posted: 8/4/2021 9:17:52 PM EDT
[Last Edit: JupiterMaximus]
[#30]
Quote HistoryOriginally Posted By nightshade1: Brownells has the Cav Arms A1 stock for sale. The buttplate is horrid dog$hit but the shell is usable. Swap the buttplate of your A2 stock onto the A1 shell, put it on, and tell me you can see the difference. I was in the same boat after coming back from the range with my former "S-DMR-ish" clone and those 5/8" are hardly missed visually. If the Cav arms stock is a copy of the Type E A1 stock, I can tell you right now that I can spot the difference immediately. If it's just an A1 length A2 style then maybe not. |
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MI, USA
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Posted: 8/4/2021 11:13:52 PM EDT
[#31]
Quote HistoryOriginally Posted By JupiterMaximus: If the Cav arms stock is a copy of the Type E A1 stock, I can tell you right now that I can spot the difference immediately. If it's just an A1 length A2 style then maybe not. It looks like an A1 length A2 but I forgot the sling mount slot lets it move 180* so never mind, its still garbage. |
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Posted: 8/5/2021 8:03:54 AM EDT
[#32]
Can you guys direct me to the correct issue magazine coupler... you know where there was another magazine hooked up to the one inserted... thanks
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Posted: 8/5/2021 8:33:11 AM EDT
[#33]
Quote HistoryOriginally Posted By CharlesBukowski: Can you guys direct me to the correct issue magazine coupler... you know where there was another magazine hooked up to the one inserted... thanks SOCOM issued the Redi-Mag for the M4A1. Never was one for the M16 series to my knowledge besides 100mph tape. CD |
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Posted: 8/5/2021 10:44:06 AM EDT
[#34]
So...how 'incorrect' would a Brownells Retro 4x scope look on A4?
 
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Posted: 8/5/2021 11:12:08 AM EDT
[#35]
Quote HistoryOriginally Posted By Creature: So...how 'incorrect' would a Brownells Retro 4x scope look on A4?https://www.ar15.com/media/mediaFiles/153820/20200112_053442-2040686.jpg https://www.ar15.com/media/mediaFiles/153820/Screenshot_20210805-104300_DuckDuckGo-2040691.jpg about 40 yrs in techinology. CD |
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Posted: 8/5/2021 11:40:21 AM EDT
[#36]
Quote HistoryOriginally Posted By Combat_Diver: about 40 yrs in techinology. CD |
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Posted: 8/5/2021 1:04:14 PM EDT
[#37]
Quote HistoryOriginally Posted By Creature: So older A4s were never equipped with colt 3x or 4x scopes and fielded by Uncle Sam? Bummer. M16/M16A1s possible. M16A4 would have been ACOGs CD |
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Posted: 8/7/2021 7:48:52 AM EDT
[Last Edit: CharlesBukowski]
[#38]
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Posted: 8/7/2021 12:43:55 PM EDT
[#39]
Quote HistoryOriginally Posted By Creature: So older A4s were never equipped with colt 3x or 4x scopes and fielded by Uncle Sam? Bummer. That optic is closer on the tech timeline to the M1 Carbine than an A4... |
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Posted: 8/15/2021 12:17:57 PM EDT
[#40]
Finally complete:
 Attached FileMy own tribute to the Marine M16A4 while also nodding to how my Army unit’s rifles were set up in Iraq. Aero Precision lower built on a PSA premium upper kit, MaTech BUIS, RCOA4 Acog, and BFG sling. I think this is complete for now. With its little brother, which is the spitting image of my M4 from Iraq with a nod to the slings they issued us in Afghanistan:  Attached File |
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Posted: 8/17/2021 12:11:18 PM EDT
[Last Edit: Ehtacs]
[#41]
Lots of beautiful builds here! Mine is underway - hopefully wrapped in a month or so. Does anyone have a spare M203 spacer? My NIB M5 kit arrived with three panels but no other accessories.
ETA - Have one! Thank you all for the generous offers! I really appreciate it! |
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TX, USA
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Posted: 8/23/2021 8:06:09 AM EDT
[#42]
Would the full size KAC 600m Rear BUIS be a clone correct option for the A4? I have several of them, but do not have a matech.
I’ve been looking, but haven’t seen one on an A4….just thought I’d ask before buying another sight. Thanks! |
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Posted: 8/23/2021 8:19:05 AM EDT
[#43]
Quote HistoryOriginally Posted By BlueFalconer: Would the full size KAC 600m Rear BUIS be a clone correct option for the A4? I have several of them, but do not have a matech. I’ve been looking, but haven’t seen one on an A4….just thought I’d ask before buying another sight. Thanks! Your BUIS is an issued sight just not commonly seen on an A4. I'm sure its been done. CD |
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Posted: 8/25/2021 2:33:43 PM EDT
[Last Edit: ringer706]
[#44]
I think I can finally call this build finished?
KAC rail, grip & sights, A4 ACOG, LaRue LT622SDO-A mount, Colt F4 grip, everything else is FN except the lower receiver itself.
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UKR
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Posted: 9/17/2021 7:31:43 AM EDT
[#45]
Quote HistoryOriginally Posted By Combat_Diver: M16/M16A1s possible. M16A4 would have been ACOGs CD Anything is possible in the reserves and national guard 
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Posted: 10/13/2021 8:48:03 PM EDT
[Last Edit: compuvette]
[#46]
Took my a2 and a4 out to the range today to test some hand loads. 77gr Sierra Match Kings with A2520. Based on testing in other rifles I’d settled on 24.5 grains and 2.26” OAL.
 The a2 is a Colt MT6700 that I swapped the barrel over to a NIW FN 20” a2 that Ohio Ordinance Works had MANY years ago. I also scored a large pin Geissele SSA off the EE. The a4 is a factory BCM upper on a DPMS lower. Geissele SSA as well. The ACOG is a TA31 with the red doughnut and a Larue Marine mount. The barrel is not an a2 profile, it’s .75” all the way so I guess you could call it a mid profile. I’d moved the ACOG forward on the upper so I knew it would be a little off. Shot three five shot groups from the a4. The worst was 1.63”  You can see the groups track down and to the left as I adjusted the ACOG. The best was the last at .54”!   I’m obviously VERY happy with how well this barrel shoots. I did have some issues with consistent target hold due to the “doughnut of death” and I attribute my larger groups to that. |
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Posted: 10/16/2021 2:06:34 AM EDT
[Last Edit: gunnut003]
[#47]
Edit
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WV, USA
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Posted: 10/18/2021 4:59:23 PM EDT
[Last Edit: kbi]
[#48]
Any good source for stock kit's for A4's
I have one stripped lower left and i dont have a 20" rifle Eyeing a colt 20" upper right now |
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Posted: 10/18/2021 5:04:28 PM EDT
[#49]
Quote HistoryOriginally Posted By kbi: Any good source for stock kit's for A4's I have one stripped lower andi dont have a 20" rifle Eyeing a colt 20" upper right now Shark Arms has FN M16A2 buttstock kits for $115 shipped. |
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NV, USA
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Posted: 10/21/2021 9:20:05 PM EDT
[#50]
 Colt AR-15A4 CK conversion kit complete upper half, Colt detachable carry handle and old Colt Match Target lower half with Colt AR-15 30 rd mag. |
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