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Some Forge Mark Basics (Page 1 of 2)
Posted: 3/18/2014 10:41:37 AM EDT
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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 |
A furore Normannorum libera nos, Domine
More Trustworthy than an Iranian Nuke Inspector
Joined:
Jun 2013
Posts:
6847
EE: 0% (0)
FL, USA
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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 |
De Oppresso Liber
Iraq: 91,03,04,05,06,08,09' & 15'
Afganistan: 09,10,11', & 14'
Iraq: 91,03,04,05,06,08,09' & 15'
Afganistan: 09,10,11', & 14'
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"O" is Performance Forge. A newer one I have been seeing on Aero and Colt Expanse series uppers.
discussion link |
" Never shoot a large caliber man with a small caliber projectile ".
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Originally Posted By rpoL98:
http://i837.photobucket.com/albums/zz300/rpol98/G%20and%20A/P1020587_zps44j3lth6.jpg |
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Originally Posted By RangerBack:
This forge marking belongs to who? Originally Posted By RangerBack:
Originally Posted By rpoL98:
http://i837.photobucket.com/albums/zz300/rpol98/G%20and%20A/P1020587_zps44j3lth6.jpg |
" Never shoot a large caliber man with a small caliber projectile ".
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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. |
Own AR parts and a scale? Support the arfcom parts weights database. Please! http://www.ar15.com/forums/t_3_118/707652_AR-Parts-Weights-Database.html
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Originally 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. |
" Never shoot a large caliber man with a small caliber projectile ".
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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 |
Own AR parts and a scale? Support the arfcom parts weights database. Please! http://www.ar15.com/forums/t_3_118/707652_AR-Parts-Weights-Database.html
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Originally 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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" Never shoot a large caliber man with a small caliber projectile ".
"Tell me why I had to be a Powerslave?"
"Usually, sometimes, does not play well with others".
"Tell me why I had to be a Powerslave?"
"Usually, sometimes, does not play well with others".
The laws of science be a harsh mistress.
Joined:
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EE: 100% (3)
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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 File CD |
De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15&16'
Afganistan: 09,10,11',14',17',18'&19'
Iraq: 91,03,04,05,06,08,09,15&16'
Afganistan: 09,10,11',14',17',18'&19'
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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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Code word is Yellow Umbrella.
"All welchers should be removed from the EE"-Aimless
"All welchers should be removed from the EE"-Aimless
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Originally Posted By Tigwelder1971:
There goes all past reasoning. 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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How much crack did you have to smoke to reach that conclusion? Was it just a $20 rock or was it like Whitney Houston level shit?
”Guitargod1985”
”Guitargod1985”
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Originally Posted By mstennes:
No kidding, that upper identifies itself as Colt/FN Originally 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 |
Code word is Yellow Umbrella.
"All welchers should be removed from the EE"-Aimless
"All welchers should be removed from the EE"-Aimless
| 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. |
The future of your lightweight AR build begins with the PWD. https://docs.google.com/spreadsheets/d/1I6Qb6kAJjChEJ56qhznv2291c5UHRDyNXuSXGObumqM/edit?usp=sharing
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Originally 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. " |
Code word is Yellow Umbrella.
"All welchers should be removed from the EE"-Aimless
"All welchers should be removed from the EE"-Aimless
| 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? |
The future of your lightweight AR build begins with the PWD. https://docs.google.com/spreadsheets/d/1I6Qb6kAJjChEJ56qhznv2291c5UHRDyNXuSXGObumqM/edit?usp=sharing
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Originally 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? |
Code word is Yellow Umbrella.
"All welchers should be removed from the EE"-Aimless
"All welchers should be removed from the EE"-Aimless
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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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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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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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| 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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Originally 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 |
"All welchers should be removed from the EE"-Aimless
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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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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? |
"All welchers should be removed from the EE"-Aimless
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Question, were these specific uppers military issue only? I managed to get my hands on one. |
Some Forge Mark Basics (Page 1 of 2)
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