I just picked up on our range a 10-shot standard M16 charging clip, assembly 11010483, marked “ggg”. I take these to be lower-case letters “G” and not number nines.
Is this the same maker as “G. G. G.” (G. G. Greene?). Is this unusual. I don’t recall seeing one of these before, although truthfully, I don’t collect them and I don’t have an AR any more to use them, so am not up to date on markings.