[Okiegunner]

I suppose it does not really matter (just kind of cool for those who have an interest in this stuff)

My AR upper and lower both have forge markings. Both are different.

The upper forge mark is located just above the front end of the forward assist. It is a square (Brass Aluminum Forge)

The lower forge mark is located just to the rear of the trigger, at about 11 o'clock. It is the keyhole mark of Cerro Forge.

Both the upper and lower forge markings are located on the starboard side of the rifle.

Just thought I would share with you guys.

[madcratebuilder]

Partial list that needs update.

Splintered A is: Anchor Harvey
Key Hole is: Cerro Forge
F keyhole is: FNMI / Cerro Forge
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
C MB is: Colt / Mueller Brass
Weird looking thing is: Cardinal Forge
CH is: Colt Harvey Aluminum
Crosshairs w/"AR" is: ArmaLite
CK is: Colt / Kaiser Aluminum
CM is: Colt / Martin Marietta
D 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