The Smith & Wesson M&P15-22 is a .22 LR variant of the Smith & Wesson M&P15 semi-automatic rifle, but is blowback-operated rather than direct impingement-operated. It is intended for recreational shooting ("plinking") and small game hunting. It is made with a polymer upper and lower receiver rather than the aluminum alloy that is normally used in AR-15 style rifles, and uses proprietary polymer box magazines.
