I have a standard M1A that I am redoing a stock for, and with that it has the standard flash hider that is not NM, so I am looking to upgrade even if it is just to a NM one. I was looking at the SEI USN/USCG brake, and I am googling and trying to look here for an answer, but I cannot find...

myself with "betsy" RHIB boat with attached gunner's mate Pulling into Saipan in 2002, we still had steel pot helmets.