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Old February 8, 2013, 08:56 AM   #18
CTS
Senior Member
 
Join Date: November 6, 2011
Location: NE Georgia
Posts: 1,070
Here is a list of forges that make upper and lower receivers. You also have to remember that the company you buy from didn't forge the part and may not have even finished it. Many buy from a machining company who buys from the forging company then finishes it and puts a roll mark on it for who ever is buying it. I have seen companies that will put your roll mark on a receiver if you send them your design. Also a partial list of what gun company uses parts from which forge. Aero Precision is not a forge, it is a machining compay.
Maybe this will help:
Upper receiver forge markings:

Offset Square is: Brass Aluminum Forging
LMT is: No Forge Marks, but marked LMT or L is: LMT
AF is: Alcoa Forge
C AF is: Colt Alco Forge
A (splintered) = Anchor Harvey Aluminum
C MB is: Colt / Mueller Brass
Cardinal’s head (stylized bird head) is: Cardinal Forge
CH is: Colt Harvey Aluminum
Crosshairs w/"AR" is: ArmaLite
CK is: Colt / Kaiser Aluminum
CM is: Colt / Martin Marietta
D (stylized) is: Diemaco
DK is: Diemaco / Kaiser Aluminum
E is: Emco
EK is: EMCO/Kaiser
E MB is: EMCO/Mueller Brass
FA is: FNMI / Anchor Harvey
FK is: FNMI / Kaiser Aluminum
FM is: FN/Martin Marietta
FMB is: FNMI / Mueller Brass
LK is: LAR / Kaiser Aluminum
LM is: LAR / Martin Marietta
M "diamond" is: Mueller Industries
PA is: Capco / Anchor Harvey
PM is: Capco / Martin Marietta
Square (symbol) is: Brass Aluminum

M-16 markings:

CAF Colt / Alcoa Forge
CH Colt / Harvey Aluminum (1st Colt Forgings)
CM Colt / Martin Marietta
DK Diemaco / Kaiser
FK, FS, BK, DK, EK, FK, AF, CW, AA, FS Bushmaster
LK FN / Kaiser
LM LAR / Martin Marietta (Army Spares Contract)
“Splintered A” F: FNMI Anchor Harvey“Splintered A” F: FNMI Anchor Harvey
“Splintered A” C: Colt Anchor Harvey
Splintered A Olympic Arms? (Anchor Harvey)


My list of verified upper receiver forge markings used by AR-15 upper manufactuers/sellers


DSA - Cardinal forge
Rock River - Cardinal forge
Delton - Cerro forge, square
DPMS - Cerro
Spikes Tactical - Cerro
Stag - Cardinal, Cerro
LWRC- splintered A
Para USA - ZM
Knight’s Armament - Cerro (keyhole)
Wilson Combat - splintered A
Double Star - Cerro
Smith &Wesson - Cerro
Daniel Defense - Cerro
Sabre Defense - Cerro?
Remington - Cerro
BCM - Cerro, square
Bushmaster - Cerro
Stag - splintered A, Cardinal
J&T Distributing (Doublestar) - Cerro, C
CMMG - Cerro
Colt M4 - Cerro (C keyhole), square, Cardinal (“C“ bird‘s head), C AF

Last edited by CTS; February 8, 2013 at 09:03 AM.
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