M&P Lower Parts Kit Complete - Includes: Magazine Catch Spring, Pistol Grip, Pistol Grip Lock Washer, Pistol Grip Screw, Pivot Pin, Pivot Pin Detent, Pivot Pin Detent Spring, Selector, Selector Detent, Selector Detent Spring, Trigger, Trigger Guard, Trigger Guard Roll Pin, Trigger Pin, Trigger Spring. Made in USAPistol GripTrigger Guard, Trigger Guard Roll PinWill work for most AR-15's