05-15-2013, 07:10 PM
How important is it to find out who did the machine work and anodizing after Cerro Forge cranked out the blank"
DSA engraves their uppers with "DSA" above the gas tube hole on the receiver face.
LAR engraves their take-down pin lugs with "L" on the back of the lug.
Some companies engrave the receiver face with:
"M4"
"4"
Some have tool head engraved T-marks in the 1913 slots, while others have laser-etched, and some look etched in another more crude fashion, with big white lettering.
DSA engraves their uppers with "DSA" above the gas tube hole on the receiver face.
LAR engraves their take-down pin lugs with "L" on the back of the lug.
Some companies engrave the receiver face with:
"M4"
"4"
Some have tool head engraved T-marks in the 1913 slots, while others have laser-etched, and some look etched in another more crude fashion, with big white lettering.