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Posted: 9/12/2010 7:01:09 PM EDT
Is there any list of forge marks available to identify who made an upper? For instance I have an upper with a circle divided in to 4 pieces some what like a pie with the top left piece missing and an the letters AR to the right of the circle..
Link Posted: 9/12/2010 7:14:12 PM EDT
[Last Edit: 9/12/2010 7:20:44 PM EDT by KfS]
Found this list:


AR 15 Upper Markings



A (splintered) = 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 (under diamond) = Mueller Industries
PA = Capco / Anchor Harvey
PM = Capco / Martin Marietta
Link Posted: 9/12/2010 11:33:20 PM EDT
Try this list

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 in a circle 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 [FN]
LM is: LAR / Martin Marietta
M "diamond" is: Mueller Industries
PA is: Capco? / Anchor Harvey [Elisco?]
PM is: Capco? / Martin Marietta [Elisco (Armalite) for the Philippine military]
Square (symbol) is: Brass Aluminum Forging
Link Posted: 9/13/2010 4:34:43 AM EDT
Just K was for Kaiser Aluminum. Unknown who machined/finished/sold them.
Link Posted: 9/13/2010 5:34:31 AM EDT
Originally Posted By verticaltech:
Is there any list of forge marks available to identify who made an upper? For instance I have an upper with a circle divided in to 4 pieces some what like a pie with the top left piece missing and an the letters AR to the right of the circle..


Armalite.
Link Posted: 9/13/2010 5:47:17 AM EDT
Originally Posted By warpig8654:
Originally Posted By verticaltech:
Is there any list of forge marks available to identify who made an upper? For instance I have an upper with a circle divided in to 4 pieces some what like a pie with the top left piece missing and an the letters AR to the right of the circle..


Armalite.

+1. ArmaLite forge marking.

Link Posted: 9/13/2010 3:54:59 PM EDT
Great stuff guy's!, plinker thats the upper I have with the assist problem. So I guess I built an AR with a TM lower, Armalite upper, FN barrel with a Bushmaster BCG....... Fraken GUN! I love it.
Link Posted: 9/13/2010 4:36:06 PM EDT
Originally Posted By altopwescap:
Try this list

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 in a circle 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 [FN]
LM is: LAR / Martin Marietta
M "diamond" is: Mueller Industries
PA is: Capco? / Anchor Harvey [Elisco?]
PM is: Capco? / Martin Marietta [Elisco (Armalite) for the Philippine military]
Square (symbol) is: Brass Aluminum Forging



My Defender 2000 LMT M4 has the cardinal forge mark and LMT logo. Came right from there factory

I also have a LMT upper with just the LMT logo I bought from Paul back in 05

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