Not an ounce of power in the CMMG MKGS Banshee 40 S&W gets left behind. The MKGS platform lower receivers are designed to accept small 40 S&W Glock-pattern magazines. Standard features include Radial Delayed Blowback Operating System; air craft grade aluminum receivers; Zeroed pistol grip, drop-in trigger, polymer dust cover, ambi-charging handle; M-LOK free float handguard and Cerakote finish. Includes Glock 22rd magazine.