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 doesnt 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. Brand Smith & Wesson Series 5.7 Model M&P Caliber 5.7x28mm Capacity 22+1 Action Internal Hammer Fired Frame Finish Black OAL 8.50" Frame Material Polymer Hand Ambidextrous Sight Style Drift Adj / Steel Slide Finish Black Armornite Slide Material Stainless Steel Slide Description Optic Ready / Serrated Mount Type 1913 Picatinny Rail Barrel Finish Black Armornite Barrel Material Steel Twist 1:9" Grips Black Textured Polymer Sight Configuration 3-Dot Includes 2 Magazines Safety Ambidextrous Slide / Manual Thumb Safety Thread Pattern 1 / 2"-28 tpi Barrel Description Steel w / Tempo System / Threaded Muzzle w / Thread Protector Barrel Length 5" Max Capacity 22 Trigger Flat Weight 26.70 oz