IF/when someone buys an imported semi auto rifle (of the ban era) that still has a butthole stock on it and he changes that stock to a pistol grip type, how does he determine if the required 922 parts that are needed to make the switch legal, are actually mfgd in the U.S.A. Are they always marked accordingly? This question may have been asked a gazillion times already but I don't recall ever seeing this particular question or a serious answer for it.
I know that I am probably opening the flood gates for a bunch of wise ass answers but I'd really like to have at least ONE serious answer - if that's even possible here - yeah, I know