Anybody have the current specs on what is legal for a non FFL 50cal M2HB unfinished rhsp? From talking to people and what I have read, the only legal option is a dummy rhsp that is thicker than what the design specs called for. Then the owner has to cut all the holes and lines and find a way to mill off the extra thickness of the plate in order to stay legal when buying a non ffl rhsp for M2HB 50 cal. This sound correct? Reason for asking is there is a non ffl M2HB kit with an 80% rhsp on GB right now and that rhsp looks like trouble for the buyer.