Any M-16 knockoff that uses M-16 parts just needs a sear added or modified. Further the original AR-15 is prone to malfunctions that let it temporarily fire full auto.
However just being a Gunny in the Marine Corps gives no one special information on this particular case, other than the fact all that is missing is the right sear.
It doesn't? My mistake, then.
I thought that part of your training to become a gunny was as a weapons expert.
I guess I'm confusing rank with ratings, aren't I?
You are thinking of a Different rank, a Gunner is a Warrant Officer rank they got rid of and brought back, their job is to be the Battalion, Regiment, Brigade Commander's duty expert on all things weapon related.
No, I was just flat out wrong, but thanks for creating a plausible excuse for my ignorance, anyway.