The M&P 5.7 with its rotating 5" Tempo Barrel System utilizes the ballistics of the 5.7x28mm round in tandem with the repeatability of the Tempo System. Get worry-free consistency, in a 22+1 handgun. The M&P 5.7 features internal hammer-fired, gas-operated, locked-breech TEMPO barrel system (barrel doesn't cam open until bullet passes gas port), slim, optimally textured grip, ambidextrous slide stop, Manual Thumb Safety, reversible magazine release, slide cut for optics, flat-face trigger for consistent finger placement allows for more accurate and repeatable shooting, Picatinny-style rail, forward slide serrations, single-action trigger break and 1 in 9" twist barrel. Includes two magazines.