This new in the box S&W M&P 15-22 is a dedicated M&P 15 format rifle designed and built as a true .22LR Rifle from the ground up, with all the standard operating features and accessory specifications of a modern version M&P 15 rifle. Twenty-five round capacity, Blow Back Semi-Auto Action, 6 position CAR Stock, 16" Carbon Steel Barrel with a 1 in 15 Twist, Front Sight Adjustable A-2 Post, Rear Adjustable Dual Aperture!