Now you can assemble your own custom, rifle caliber pistol powerhouse with the SCR Pistol Lower Receiver Assembly! Includes everything that's needed; simply add your choice of AR/M4 upper, magazine, bolt and firing pin and you've got it made with no gunsmith required! Through creative engineering and a quest for uncompromising performance, the revolutionary SCR Pistol is in a class of its own and successfully bridges the capability gap between a common handgun and an individual battle carbine.