S&W M&P FPC is compatible with M&P Pistol double-stack magazines. The gun features integrated recoil buffer system; reversible magazine catch; threaded muzzle with thread protector; in-stock magazine storage w/quick-release tab system; horizontal folding mechanism with locking latch, design doesn't interfere with top-mounted optics and charging slide/handle doubles as retainer when folded. Includes carrying bag with additional storage and Velcro straps; four interchangeable palmswell grip adapters, one 17rd and two 23rd magazines. *Accepts any M&P full size or compact double stack pistol magazine. Includes one 17rd magazines, two 23rd magazines, four interchangeable palmswell grip inserts and soft case.