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Posted: 3/18/2014 10:41:37 AM EDT
A = Anchor Harvey Aluminum
AF = Alcoa Forge C AF = Colt Alco Forge C MB = Colt / Mueller Brass Cardinal (Stylized) = Cardinal Forge CH = Colt Harvey Aluminum Circle/Crosshairs w/ "AR” = ArmaLite CK = Colt / Kaiser Aluminum CM = Colt / Martin Marietta D (Stylized) = Diemaco DK = Diemaco / Kaiser Aluminum E = Emco EK = EMCO / Kaiser E MB = EMCO / Mueller Brass F Keyhole = FNMI / Cerro Forge FA = FNMI / Anchor Harvey FK = FNMI / Kaiser Aluminum FM = FN/Martin Marietta FMB = FNMI / Mueller Brass Keyhole = Cerro Forge L = Lewis Machine & Tool LK = LAR / Kaiser Aluminum LM = LAR / Martin Marietta M = Mueller Industries PA = Capco / Anchor Harvey PM = Capco / Martin Marietta Square = Brass Aluminum Forging Enterprises |
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VA, USA
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Posted: 3/18/2014 12:05:39 PM EDT
[#1]
Thanks, I filed the list for future reference.
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VA, USA
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Posted: 3/18/2014 8:30:31 PM EDT
[#2]
Thanks for the info!
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Posted: 3/18/2014 9:00:27 PM EDT
[#3]
Thanks for posting
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NC, USA
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Posted: 3/19/2014 11:11:27 AM EDT
[Last Edit: pumpkinboy]
[#4]
is Mueller Industries a good one for an upper?
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Posted: 3/23/2015 3:41:22 PM EDT
[#5]
Quote HistoryOriginally Posted By pumpkinboy: is Mueller Industries a good one for an upper? Ja ETA: Bump |
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Posted: 3/23/2015 4:11:46 PM EDT
[#6]
Thanks op, now I know where my arfcom upper/lower were made.
Txl |
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Posted: 2/16/2016 2:17:47 PM EDT
[#7]
Bump 
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Posted: 2/17/2016 6:30:12 AM EDT
[#8]
Demco Inc has a DoD contract. CD |
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Posted: 2/17/2016 6:35:01 AM EDT
[#9]
Great. Remind me to never buy capco. Lol.
Thanks OP. |
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AZ, USA
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Posted: 2/17/2016 6:17:41 PM EDT
[#10]
Thanks! Good info.
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Posted: 2/17/2016 6:27:48 PM EDT
[#11]
Thank you for posting that information.
Source? |
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Posted: 4/4/2016 2:41:20 AM EDT
[#12]
had some requests for photos of FN receivers-back to front
M16A2 dated 03/10 M16A4 dated 10/05 M16A4 dated 06/14 M4 dated 02/16 
only M4 is marked for Carbine receiver cuts, all others have rifle cuts 
T marks 
and bolt carrier 
CD |
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Posted: 4/7/2016 12:21:13 PM EDT
[Last Edit: Combat_Diver]
[#13]
06/07 dated Colt M4 upper receiver. No previous Colt markings. Cage Code 13629 is Colt.
CD |
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USA
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Posted: 3/25/2017 6:23:23 AM EDT
[Last Edit: rpoL98]
[#14]
EMCO
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Posted: 3/26/2017 11:07:50 AM EDT
[#15]
"O" is Performance Forge. A newer one I have been seeing on Aero and Colt Expanse series uppers.
discussion link |
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USA
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Posted: 3/26/2017 8:17:47 PM EDT
[#16]
Quote HistoryOriginally Posted By rpoL98:
http://i837.photobucket.com/albums/zz300/rpol98/G%20and%20A/P1020587_zps44j3lth6.jpg |
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Posted: 3/26/2017 8:52:27 PM EDT
[#17]
Quote HistoryOriginally Posted By RangerBack:
This forge marking belongs to who? Quote HistoryOriginally Posted By RangerBack:
Originally Posted By rpoL98:
http://i837.photobucket.com/albums/zz300/rpol98/G%20and%20A/P1020587_zps44j3lth6.jpg |
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USA
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Posted: 3/26/2017 9:33:26 PM EDT
[#18]
Thanks, I picked one up in a trade with the same mark.
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Posted: 4/7/2017 1:42:03 AM EDT
[Last Edit: Frost7]
[#19]
Interestingly, all the Colt and Knight's weapons I've seen made within the last few years are universally either Cerro (Colt & KAC) or Brass Aluminum (Colt).
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AZ, USA
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Posted: 5/2/2017 10:51:29 PM EDT
[#20]
So what if your upper receiver has no maker marking? Flat top, M4 feed ramps, FA and dust cover.
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Posted: 5/3/2017 5:45:10 AM EDT
[Last Edit: TGWLDR]
[#21]
Then you have no idea of its quality. Again, this is only in the forging process.
The machine work is what is paramount. |
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Posted: 5/3/2017 7:12:49 PM EDT
[Last Edit: jekbrown]
[#22]
Originally Posted By FeuerStolz:
Circle/Crosshairs w/ "AR” = ArmaLite Also, I see this list cut/pasted everywhere, so I went ahead and added it to the PWD. |
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Posted: 5/3/2017 7:54:58 PM EDT
[#23]
Quote HistoryOriginally Posted By jekbrown:
Does this mean that if it's JUST a circle it's also ArmaLite? I scored some dirt cheap uppers online and there was no info on who made the forgings, but they do have just a plain circle on them between the deflector and the charging handle area... Also, I see this list cut/pasted everywhere, so I went ahead and added it to the PWD. |
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Posted: 5/4/2017 12:37:32 AM EDT
[#24]
Awesome, thanks for the info!
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Posted: 5/4/2017 12:47:46 AM EDT
[#25]
Armed with the company name I found this helpful thread with a bit more info that might help other consumers...
https://www.ar15.com/forums/t_3_12/676292_.html&page=1 |
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Posted: 5/4/2017 5:39:29 AM EDT
[#26]
That thread was the beginning of how I learned about the O forge mark also
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IL, USA
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Posted: 5/8/2017 7:07:03 PM EDT
[#27]
Found this Forging process on line- Heat it and Beat it Baby!!!!!
https://vimeo.com/134011966 |
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WV, USA
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Posted: 8/2/2017 10:25:33 AM EDT
[#28]
recently picked up a couple of the recoil gunworks flood uppers and they have a circle with a dot forge mark, have not seen this in any of the forge code lists???
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Posted: 8/2/2017 10:39:31 AM EDT
[#29]
Quote HistoryOriginally Posted By stingray230sx:
recently picked up a couple of the recoil gunworks flood uppers and they have a circle with a dot forge mark, have not seen this in any of the forge code lists??? 
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Posted: 8/17/2017 3:40:36 PM EDT
[#30]
Good info...and a 3+ year old thread that is still only one page. Impressive.
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Posted: 3/5/2019 8:19:44 AM EDT
[Last Edit: Combat_Diver]
[#31]
Monkey wrench in the works here. Just got two of these thru the military supply system. 3S679 marked (FN cage code) C for Colt and Square (Brass Aluminum Forging Enterprises).
 Attached File Attached File Attached FileCD |
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Posted: 3/5/2019 10:38:29 AM EDT
[#32]
Quote HistoryOriginally Posted By Combat_Diver:
Monkey wrench in the works here. Just got two of these thru the military supply system. 3S679 marked (FN cage code) C for Colt and Square (Brass Aluminum Forging Enterprises). https://www.AR15.Com/media/mediaFiles/32677/IMG_6829_jpg-866991.JPG https://www.AR15.Com/media/mediaFiles/32677/IMG_6830_jpg-866992.JPG https://www.AR15.Com/media/mediaFiles/32677/IMG_6831_jpg-866993.JPG CD
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Posted: 3/6/2019 4:42:21 PM EDT
[#33]
Quote HistoryOriginally Posted By Tigwelder1971:
There goes all past reasoning. Quote HistoryOriginally Posted By Tigwelder1971:
Originally Posted By Combat_Diver:
Monkey wrench in the works here. Just got two of these thru the military supply system. 3S679 marked (FN cage code) C for Colt and Square (Brass Aluminum Forging Enterprises). https://www.AR15.Com/media/mediaFiles/32677/IMG_6829_jpg-866991.JPG https://www.AR15.Com/media/mediaFiles/32677/IMG_6830_jpg-866992.JPG https://www.AR15.Com/media/mediaFiles/32677/IMG_6831_jpg-866993.JPG CD
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Posted: 3/6/2019 5:26:39 PM EDT
[#34]
Quote HistoryOriginally Posted By mstennes:
No kidding, that upper identifies itself as Colt/FN Quote HistoryOriginally Posted By mstennes:
Originally Posted By Tigwelder1971:
Originally Posted By Combat_Diver:
Monkey wrench in the works here. Just got two of these thru the military supply system. 3S679 marked (FN cage code) C for Colt and Square (Brass Aluminum Forging Enterprises). https://www.AR15.Com/media/mediaFiles/32677/IMG_6829_jpg-866991.JPG https://www.AR15.Com/media/mediaFiles/32677/IMG_6830_jpg-866992.JPG https://www.AR15.Com/media/mediaFiles/32677/IMG_6831_jpg-866993.JPG CD |
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Posted: 3/6/2019 6:44:25 PM EDT
[#35]
Serious question: other than putting their name on things, does Colt do anything anymore? Seems like everything in contracted and "their" guns these days are "Colt" in name only.
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Posted: 3/6/2019 8:52:38 PM EDT
[#36]
Quote HistoryOriginally Posted By jekbrown:
Serious question: other than putting their name on things, does Colt do anything anymore? Seems like everything in contracted and "their" guns these days are "Colt" in name only. ">outsourcing production of all major riflecomponents including bolts and barrels. " |
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Posted: 3/6/2019 9:59:21 PM EDT
[#37]
Uhg, not trying to go off topic, but that's just ridiculous. Pretty soon Colt will just be a laser engraving shop. I never was really on the bandwagon, but yikes, how is anyone else at this point?
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Posted: 3/6/2019 10:03:08 PM EDT
[#38]
Quote HistoryOriginally Posted By jekbrown:
Uhg, not trying to go off topic, but that's just ridiculous. Pretty soon Colt will just be a laser engraving shop. I never was really on the bandwagon, but yikes, how is anyone else at this point? |
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PA, USA
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Posted: 3/8/2019 6:06:13 PM EDT
[#39]
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Posted: 3/8/2019 8:43:53 PM EDT
[#40]
C marked in an FN CAGE marked bag: (also one of CD's pics)
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Posted: 5/4/2019 10:01:20 AM EDT
[#41]
My Colt 1971 SP-1 has no forge marks anywhere, just 2 faint inspection stamps in front and above the ejection port.
The C MP C on the barrel and nothing on the front sight base. The upper & lower parked finish matches perfectly and is in very nice shape especially for it's age. Black carrier W/FA notches and "C" stamp. A1 birdcage, no butt trap door or forward assist...looks all original to me. |
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TN, USA
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Posted: 5/23/2019 8:21:08 AM EDT
[#42]
I would like to add a little info from a convo I am having with an 80% lower provider. They have been kind enough to share info with me and I never said I was going to share the info, so out of respect I won't say who this is.
THEM: "we have used performance forge, brass and aluminum forge, and cerro forge. Your lowers are performance forge 7075 forgings. The cost difference in the forging brands is minimal, so we generally try to use the best quality. We actually had a batch from cerro recently that were forged on a taper front to back, and top to bottom. The problem with that is they don't fixture flat. Yes we are only talking about a few thousands taper, but not laying flat when fixturing causes each cut to be off by a few thousandths. The end result is still usable and not noticeable to most, but not the quality we shoot for. We ended up sending the whole pallet back to them." 1 of 2 due to "new' account status and low posting #'s I have to split this into two posts.... |
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TN, USA
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Posted: 5/23/2019 8:21:59 AM EDT
[#43]
2 of 2
ME: "Thanks for the excellent info! Would a forging problem such as your Cerro issue leave the finisher wondering why the FC pocket floor tapers a few thou from one end to the other? Or why some have non-symmetrical machining? I've been measuring and comparing various lowers (because I'm a nerd with more calipers than fingers and toes) and have been trying to understand where in the process some of these differences are coming from. As a shade tree mechanic for 30 years I've encountered things like core shift in heads and engine blocks, and have been wondering if similar problems existed in the forging world. Your info about the cerros was like the Sun coming up. Alas I see. I understand machining fairly well (plenty of time on lathes, Bridgeports, Fadals...I even code...yes, I speak GCode), but do not intimately know the process or fixtures for taking a raw forging to 80% status.....so until now I could only guess. And I am guessing that other suppliers have not been as careful as you and either did not notice, did not think it's a problem, or did not care. Thank you so much for the enlightenment. You've earned my business as well as respect." So when people say that the machining is paramount, while correct, it is also paramount that the shop recognize forging problems (which clearly DO happen in the forging process, so not all are alike) before even starting the machining. I have a strong suspicion that many suppliers don't realize, or don't care. I have a feeling that several are relying on the "not noticeable to most" or "close enough" aspect and sending them out. I've been measuring and trying to track where the differences are coming from. I am finally getting somewhere I believe. Some measurement differences are at the machinist level, some go all the way back to the forging. 
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Posted: 5/23/2019 12:07:50 PM EDT
[#44]
A new one for the list....
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PA, USA
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Posted: 5/27/2019 10:05:28 PM EDT
[Last Edit: JimMorrison74]
[#45]
Can anyone help me identy this upper and barrel. This is the only mark on the upper and this is the only markings on the barrel. Yes I took off the hand guards and nothing under there. It has a PSA lower. https://imgur.com/a/pL2QoBs
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Posted: 5/27/2019 10:25:07 PM EDT
[#46]
Quote HistoryOriginally Posted By JimMorrison74:
Can anyone help me identy this upper and barrel. This is the only mark on the upper and this is the only markings on the barrel. Yes I took off the hand guards and nothing under there. It has a PSA lower. https://imgur.com/a/pL2QoBs Likely PSA machined and looks to be a nitrided barrel/std markings. Most likely a complete PSA gun |
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PA, USA
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Posted: 5/28/2019 7:42:11 AM EDT
[#47]
Thank you very much
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AL, USA
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Posted: 7/10/2019 10:08:59 AM EDT
[#48]
Check out the forge mark on this upper on a GB listing:
https://www.gunbroker.com/item/820228834 A simple circle? |
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Posted: 7/10/2019 10:45:12 AM EDT
[#49]
Originally Posted By Tigwelder1971: Plain O is Performance Forge. Originally Posted By Glynn863:
Check out the forge mark on this upper on a GB listing: https://www.gunbroker.com/item/820228834 A simple circle? |
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USA
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Posted: 11/26/2020 11:22:05 PM EDT
[#50]
Quote HistoryQuestion, were these specific uppers military issue only? I managed to get my hands on one. |
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