Expertowgunner
Member
I got a S&W M&P-15a off of a friend about a month ago and im planning on ordering magpul pmags for it. I accidentally stumbled across a article that stated that the pmags might not fit in early production mp rifles. My serial number is in the 18xxx range is this one of the problematic rifles and if so does S&W do a return service to either modify or replace the lower? any help is good and appreciated help.