Re: mark AR mount for M&P15 PC, Suggestions?
If you don't plan on taking it on and off the rifle regularly then RRA, Armalite, BSquare, lots of 1-piece mounts out there and they all work fine. Ebay for stuff like that sometimes you get lucky and get a pepr or RRA for sub 40bucks. Weaver makes one now for 70$ says made in USA and you can take it on and off by hand (no tools) although I'm not sure as to how well it holds its zero when removed. Midway carries them.