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KY, USA
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Posted: 1/5/2020 10:56:20 AM EDT
[#1]
Where are you guys finding the non F marked barrels for these?
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Posted: 2/6/2020 8:18:55 AM EDT
[Last Edit: JBecker_72]
[#2]
I just ordered a complete upper from TNTE Sales. I know I'm gonna be waiting a while for it, but $500 for a pinned 14.5" A2 upper seemed hard to beat.
Glad to finally be getting one of these. It's been on my want list for a while. |
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KY, USA
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Posted: 4/18/2020 10:07:36 AM EDT
[Last Edit: sdacbob]
[#3]
This sort of looks like my old Bushmaster XM15E2S. It had a 14.5'' barrel with a p&w A2 extended FH (after the mini tri-y was cut off). Fixed A2 carry handle, I believe it had double shielded hand guards, came with the pinned collapsible stock during the Clinton assault rifle ban. Non "F" marked front sight.
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Posted: 9/18/2020 11:56:09 AM EDT
[#4]
I was assigned this rifle back in 2013. This one had been in the inventory an long time.
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TN, USA
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Posted: 9/18/2020 9:36:42 PM EDT
[Last Edit: KP49]
[#5]
Glad this thread is pinned, picked up an 14.5" A2 upper and I could not figure out what the barrel was looking at the pics but it was fairly cheap so I bought it. Its marked C MP 5.56 Nato 1/7 but I thought the markings were fake because of the profile. It looks lightly used, CM marked A2 upper with the C in a box and triangle marks in the front, large FA with D shaped cut, C marked FSB, large colt handguards, side sling mount and what looks like an early profile barrel.
Was going to build a BHD clone but I guess it will be an XM4 clone now :) Pic of the barrel, will post more pics when it arrives. 
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Posted: 9/18/2020 10:28:11 PM EDT
[#6]
Quote HistoryOriginally Posted By bolster: I was assigned this rifle back in 2013. This one had been in the inventory an long time. https://hosting.photobucket.com/albums/a270/bolster/C2E7A866-123B-4D77-AC58-DC1D576F7DF0_zpsw8okrvio.jpg https://hosting.photobucket.com/albums/a270/bolster/M4machining1_zps517190f9.jpg Is that a Texas Guard rifle? |
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Posted: 9/19/2020 11:05:06 AM EDT
[#7]
Quote HistoryOriginally Posted By backbencher: Is that a Texas Guard rifle? It belongs to a federal agency. |
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Posted: 9/21/2020 1:38:30 AM EDT
[#8]
Quote HistoryOriginally Posted By KP49: Glad this thread is pinned, picked up an 14.5" A2 upper and I could not figure out what the barrel was looking at the pics but it was fairly cheap so I bought it. Its marked C MP 5.56 Nato 1/7 but I thought the markings were fake because of the profile. It looks lightly used, CM marked A2 upper with the C in a box and triangle marks in the front, large FA with D shaped cut, C marked FSB, large colt handguards, side sling mount and what looks like an early profile barrel. Was going to build a BHD clone but I guess it will be an XM4 clone now :) Pic of the barrel, will post more pics when it arrives. https://i.imgur.com/LAY502F.jpg Thanks for posting pictures of the barrel profile. Do you think the whole upper was issued or rebuilt with the issued barrel? I have seen the posted pictures from the Black Rifle books here but not any others. Pics of the whole upper would be great! |
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TN, USA
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Posted: 9/21/2020 11:29:36 AM EDT
[#9]
Quote HistoryOriginally Posted By imdBman: Thanks for posting pictures of the barrel profile. Do you think the whole upper was issued or rebuilt with the issued barrel? I have seen the posted pictures from the Black Rifle books here but not any others. Pics of the whole upper would be great! I dont know if it has been rebuilt, used or is unissued, seller said looks like not used much and mostly handling wear. I had no idea what an XM4 was when I bought it and was researching the odd barrel profile when I cam across this thread, I just wanted to put together a BHD/727 style rifle and figured the barrel was aftermarket. I have one more pic of the upper I was able to pull from my browser cache, should be here in a couple days and I'll take better pics. 
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Posted: 9/28/2020 11:45:31 AM EDT
[#10]
Quote HistoryOriginally Posted By bolster: I was assigned this rifle back in 2013. This one had been in the inventory an long time. https://hosting.photobucket.com/albums/a270/bolster/C2E7A866-123B-4D77-AC58-DC1D576F7DF0_zpsw8okrvio.jpg https://hosting.photobucket.com/albums/a270/bolster/M4machining1_zps517190f9.jpg COTS commercial (LE)/export R0777. ~Augee |
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Posted: 9/28/2020 11:46:30 AM EDT
[#11]
Quote HistoryOriginally Posted By KP49: Glad this thread is pinned, picked up an 14.5" A2 upper and I could not figure out what the barrel was looking at the pics but it was fairly cheap so I bought it. Its marked C MP 5.56 Nato 1/7 but I thought the markings were fake because of the profile. It looks lightly used, CM marked A2 upper with the C in a box and triangle marks in the front, large FA with D shaped cut, C marked FSB, large colt handguards, side sling mount and what looks like an early profile barrel. Was going to build a BHD clone but I guess it will be an XM4 clone now :) Pic of the barrel, will post more pics when it arrives. https://i.imgur.com/LAY502F.jpg This is an R0720 (XM4) prototype barrel profile. Not sure where you got it from, but I have a feeling I know roughly where it came from. It's a nice find. ~Augee |
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TN, USA
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Posted: 9/28/2020 8:03:22 PM EDT
[#12]
Quote HistoryOriginally Posted By TNVC_Augee: This is an R0720 (XM4) prototype barrel profile. Not sure where you got it from, but I have a feeling I know roughly where it came from. It's a nice find. ~Augee Came from a place I buy WWII milsurp stuff from out west. It was on their site for a while and I figured I would take a chance on it since it had the side sling and large forward assist button that was machined to fit the A2 lower. it disappeared on fedex tracking for a couple days but just popped up in my town tonight so hopefully I'll have it tomorrow and I'll post some better pics. |
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TN, USA
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Posted: 9/29/2020 10:58:38 PM EDT
[#13]
Here are some pics I took this morning before cleaning it up, upper looks original and unmolested and has had some use. Pinned an extended flash hider on, slapped it on a PSA A2 lower and put a quick 50 rounds through it and it shoots great. I am going change out the extended hider to an ADCO spacer and stock A2 flashider, the extended A2 looks odd to me.
Not sure how long the pics will stay up, if the OP wants to copy and use any of them feel free.            And my kid shooting some 100yd steel targets, nice of the previous user to adjust the sights :)  |
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Posted: 10/1/2020 1:34:26 PM EDT
[Last Edit: bolster]
[#14]
Quote HistoryOriginally Posted By TNVC_Augee: COTS commercial (LE)/export R0777. ~Augee Most of them in our agency have been repurposed as Mk18’s now. |
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Posted: 10/1/2020 6:32:27 PM EDT
[#15]
My contribution:
 Attached File Attached File Attached FileIt's a 14.5" Colt barrel with P&W A2X on a Colt upper, with a PSA M4 lower and Model 1 Sales CAR stock. Yeah, it's not 100% clone correct, but, without $30k for a registered Colt receiver, it never would be. So, it's close enough for me. |
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Posted: 10/2/2020 10:41:31 AM EDT
[#16]
Quote HistoryOriginally Posted By SiVisPacem: My contribution: https://www.AR15.Com/media/mediaFiles/242045/FB_IMG_1601591322328_jpg-1615323.JPG https://www.AR15.Com/media/mediaFiles/242045/FB_IMG_1601591325640_jpg-1615326.JPG https://www.AR15.Com/media/mediaFiles/242045/FB_IMG_1601591329364_jpg-1615328.JPG It's a 14.5" Colt barrel with P&W A2X on a Colt upper, with a PSA M4 lower and Model 1 Sales CAR stock. Yeah, it's not 100% clone correct, but, without $30k for a registered Colt receiver, it never would be. So, it's close enough for me. Well done! I think your lower receiver is just fine. |
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Posted: 10/2/2020 3:14:59 PM EDT
[#17]
Quote HistoryOriginally Posted By bolster: Well done! I think your lower receiver is just fine. Quote HistoryOriginally Posted By bolster: Originally Posted By SiVisPacem: My contribution: https://www.AR15.Com/media/mediaFiles/242045/FB_IMG_1601591322328_jpg-1615323.JPG https://www.AR15.Com/media/mediaFiles/242045/FB_IMG_1601591325640_jpg-1615326.JPG https://www.AR15.Com/media/mediaFiles/242045/FB_IMG_1601591329364_jpg-1615328.JPG It's a 14.5" Colt barrel with P&W A2X on a Colt upper, with a PSA M4 lower and Model 1 Sales CAR stock. Yeah, it's not 100% clone correct, but, without $30k for a registered Colt receiver, it never would be. So, it's close enough for me. Well done! I think your lower receiver is just fine. Thank you. My next project is to clone W016312, the M4 I took to Kosovo in 2000 and Afghanistan in 02 with the 101st. It looked exactly like this one, except it had a flattop and detachable carry handle, rather than the A2 upper. |
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USA
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Posted: 11/23/2020 6:24:56 AM EDT
[#18]
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Posted: 9/18/2021 11:17:14 PM EDT
[#19]
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Posted: 9/20/2021 5:05:00 PM EDT
[#20]
Anyone have specifics on the experimental XM4 barrel profile? Thinking of having one turned down to match.
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Posted: 9/21/2021 4:16:09 PM EDT
[#21]
Quote HistoryOriginally Posted By coejro: Anyone have specifics on the experimental XM4 barrel profile? Thinking of having one turned down to match. Wish I could help more, but, green Mountain used to sell a version of the XM profile. They no longer list them but might be worth a phone call direct.Green Mountain AR 15 Barrels |
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Posted: 9/22/2021 10:03:32 PM EDT
[Last Edit: coejro]
[#22]
Spoke with them on the phone, no luck. Appreciate the tip. The lady I spoke to had been with them for 6 years and didn't remember an XM4 profile and couldn't tell me anything on it. Worth the try though.
I have an older colt M4 profile barre coming though, and using the pictures on page 1 I'm pretty sure I can infer what it should be. I'll post when I get it hands on. |
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Posted: 9/25/2021 2:21:44 AM EDT
[#23]
Quote HistoryOriginally Posted By coejro: Spoke with them on the phone, no luck. Appreciate the tip. The lady I spoke to had been with them for 6 years and didn't remember an XM4 profile and couldn't tell me anything on it. Worth the try though. I have an older colt M4 profile barre coming though, and using the pictures on page 1 I'm pretty sure I can infer what it should be. I'll post when I get it hands on. Darn. I swear it was not that long ago that I saw them but then again I am getting older. 
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LA, USA
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Posted: 2/5/2022 9:26:56 PM EDT
[#24]
So I just bought a true colt 720 xm4 parts kit minus the reciever. Still has original barrel and everything. What's the best lower I should start looking for? I wanna get it pretty close to what it came with. The cut off reciever section that came with the parts kit was safe, semi, and full, don't know if that helps but thank u in advance. I don't wanna mess this up since it is one of my favorite carbines. Thanks so much in advance.
Fieldy |
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AZ, USA
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Posted: 2/5/2022 11:05:04 PM EDT
[#25]
Quote HistoryOriginally Posted By Pdesselle: So I just bought a true colt 720 xm4 parts kit minus the reciever. Still has original barrel and everything. What's the best lower I should start looking for? I wanna get it pretty close to what it came with. The cut off reciever section that came with the parts kit was safe, semi, and full, don't know if that helps but thank u in advance. I don't wanna mess this up since it is one of my favorite carbines. Thanks so much in advance. Fieldy I took the easy way out and used this lower on my 727 build. https://palmettostatearmory.com/psa-m16a2-ar-15-stripped-lower-receiver.html |
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Posted: 2/6/2022 1:24:38 PM EDT
[#26]
Quote HistoryOriginally Posted By Pdesselle: So I just bought a true colt 720 xm4 parts kit minus the reciever. Still has original barrel and everything. What's the best lower I should start looking for? I wanna get it pretty close to what it came with. The cut off reciever section that came with the parts kit was safe, semi, and full, don't know if that helps but thank u in advance. I don't wanna mess this up since it is one of my favorite carbines. Thanks so much in advance. Fieldy The XM4 was SAFE - SEMI - BURST, so that lower was not from a XM4. There isn't any currently available 80% that matches the early A2 profile you would need for the XM4. |
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LA, USA
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Posted: 2/22/2022 2:25:41 PM EDT
[#27]
https://imageshack.com/i/po4OOoCAj
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Posted: 2/25/2022 12:24:12 PM EDT
[#28]
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Posted: 2/25/2022 6:45:46 PM EDT
[Last Edit: backbencher]
[#29]
Originally Posted By samuraiadamxm177: https://imageshack.com/i/po4OOoCAj 
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Posted: 4/15/2022 9:37:20 PM EDT
[#30]
Just put this one together using a PSA M4 cage code lower and Colt MPC bolt and carrier. I thought the cage code was fake but Josiah said they have their own cage code. Anyway I kind of like the way it turned out.
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Posted: 7/26/2022 3:09:00 PM EDT
[#31]
Is this correct?
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Posted: 7/28/2022 11:07:07 AM EDT
[Last Edit: imdBman]
[#32]
Quote HistoryJust a guess; 15.5 including flash hider. They were only measuring for historical listing. That should be the approximate length of a 14.5 barrel plus the FH since we all have to add another 1/2 inch to extend our FH for legal length. Also that is a great picture of the early XM4 profile which is smaller forward of the FSB until the collar. Green Mountain used to sell that profile but quit a few years ago. ETA: Ok, I am stupid. The picture is a repost from PG 1. |
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Posted: 1/20/2023 11:55:32 AM EDT
[#33]
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Posted: 1/25/2023 3:04:32 PM EDT
[#34]
Quote HistoryOriginally Posted By bolster: I was assigned this rifle back in 2013. This one had been in the inventory an long time. https://hosting.photobucket.com/albums/a270/bolster/C2E7A866-123B-4D77-AC58-DC1D576F7DF0_zpsw8okrvio.jpg https://hosting.photobucket.com/albums/a270/bolster/M4machining1_zps517190f9.jpg WOW!  Attached File |
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CA, USA
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Posted: 3/22/2023 2:49:38 PM EDT
[#35]
Great pictures in this thread. Have an A2 upper I dont know what to build into still. Torn between an M16A2 rifle or this XM4 style build.
Already have a Colt M4 (new production) so thinking something a little old school would pair great with it. |
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Posted: 3/22/2023 4:33:31 PM EDT
[#36]
Quote HistoryOriginally Posted By TNVC_Augee: ... The S-1-F SOF variant of the M4 Carbine, the M4A1, which does not appear to have gone through an operational testing period and appears to have always been in a flattop configuration (there does not appear to be any indication I've yet found of "XM4E1" or "XM4A1" marked guns being produced, though you never know with Colt...) was designated the R0921. The M4A1 Carbines would have gone primarily to units within USSOCOM and other SOF proponents that already had COTS R072x-series weapons (usually mixed in with M16A2s), and M4A1s and R072x and even some R0777 (see below) would/could have all served along side each other during the mid-to-late 1990s when this transition was occurring. ~Augee Leg Army was to get the fixed carry handle upper and "Burst." The Department of the Army Master Priority List (DAMPLE) had the 82nd, 10th Mountain, and 101st as the first XVIIIth Airborne Corps units to be fielded in Big Army, while USASOC's units had fielding from JSOC, Rangers, then the Groups. Army Modified Tables of Organization and Equipment (MTOEs) were changed from M16A2s to M4A1s. Table of Distribution and Allowances (TDAs) held on to the "5.56mm Carbine" until the M16A2 phase-out was complete -- so a guy on specified ODAs might have weapons cards for both an MTOE M16A2 and Beretta (that never left the arms room) and a TDA Colt 723 and .45. At one time on an ODA I had a dozen weapons cards for individual weapons for different missions and contingencies. |
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Posted: 3/22/2023 9:08:14 PM EDT
[#37]
Would be fun to build a M4A1 clone w/ a Balimoy engraved overstamp & fixed carry handle upper.
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IN, USA
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Posted: 6/6/2023 10:53:08 PM EDT
[#38]
Would I be crazy to use a 14.5" DD barrel with a no-name but correct height FSB vs snagging a Colt barrel assembly with Flattop height FSB?
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TX, USA
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Posted: 8/29/2023 8:29:53 PM EDT
[#39]
I just got an upper from a buddy and it has the keyhole stamp but no others what could this mean
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NM, USA
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Posted: 10/2/2023 2:50:27 PM EDT
[Last Edit: wtwining]
[#40]
Quote HistoryOriginally Posted By Masoncarpy: I just got an upper from a buddy and it has the keyhole stamp but no others what could this mean Cerro Forge, who machined it? Anybody's guess. Welcome to the site! |
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NM, USA
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Posted: 10/2/2023 2:52:32 PM EDT
[#41]
Quote HistoryOriginally Posted By EMSintraining: Would I be crazy to use a 14.5" DD barrel with a no-name but correct height FSB vs snagging a Colt barrel assembly with Flattop height FSB? That all depends on if your OCD or not. Me? It drives me crazy. |
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IN, USA
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Posted: 10/2/2023 11:20:15 PM EDT
[Last Edit: EMSintraining]
[#42]
Problem solved, snagged a 1995 Colt barrel as it turns out!
Next riddle is finding the correct side sling mount. I'm looking at the photos in thread and the side sling mount isn't the old school A1/A2 mount but it's also not the more modern M4 mount either. I'm gonna take a flying leap and guess those are not readily available anywhere so gonna suck it up and get a more recent M4 side sling mount. Heart broken. Although... The ranger eval pic on page 1 does show a standard bottom sling mount. So maybe I can make this work as is? |
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Posted: 10/27/2023 11:20:47 PM EDT
[Last Edit: bradpierson26]
[#43]
XM4 cannot have the early 2000s M4 carbine stock, right? Has to be the old N stock?
The lowers are marked “M4 Carbine”, right? |
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Posted: 10/29/2023 1:00:57 PM EDT
[#44]
BUMP
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NM, USA
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Posted: 10/29/2023 1:42:31 PM EDT
[#45]
Quote HistoryOriginally Posted By bradpierson26: XM4 cannot have the early 2000s M4 carbine stock, right? Has to be the old N stock? The lowers are marked “M4 Carbine”, right? From what I can tell, in 2002 all M4's shipped to the government had the new improved stock. |
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NM, USA
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Posted: 10/29/2023 1:46:10 PM EDT
[#46]
I found this info on gunbroker, wish I had all of it.....
    
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Posted: 10/29/2023 3:34:29 PM EDT
[#47]
Quote HistoryOriginally Posted By wtwining: From what I can tell, in 2002 all M4's shipped to the government had the new improved stock. Quote HistoryOriginally Posted By wtwining: Originally Posted By bradpierson26: XM4 cannot have the early 2000s M4 carbine stock, right? Has to be the old N stock? The lowers are marked “M4 Carbine”, right? From what I can tell, in 2002 all M4's shipped to the government had the new improved stock. But those all had a4 uppers with removable carry handles, right? No A2 uppers with waffle stocks? |
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NM, USA
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Posted: 10/29/2023 7:48:50 PM EDT
[#48]
Quote HistoryOriginally Posted By bradpierson26: But those all had a4 uppers with removable carry handles, right? No A2 uppers with waffle stocks? From the factory? I would say no, but don't ask me for proof. |
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Posted: 10/30/2023 6:15:17 PM EDT
[#49]
Quote HistoryOriginally Posted By bradpierson26: But those all had a4 uppers with removable carry handles, right? No A2 uppers with waffle stocks? The A2 upper is only on the XM4 and probably the first 1000 M4s. All subsequent M4s and all M4A1s are flat top uppers, and could have the detachable carry handle. |
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IN, USA
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Posted: 11/5/2023 4:07:31 PM EDT
[Last Edit: EMSintraining]
[#50]
Would there be anything better than the basic black nylon silent sling for an XM4 build? I've got my XM4 upper just about done (Except I haven't knocked out the front sling to install side swivel yet) But that's next. Lower receiver itself hasn't shipped yet but I have all the parts lined up so that'll be a real quick and easy build once it is shipped.
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