The Gas Buster Charging Handle for the family of 308 AR's Armalite, DPMS, and KAC, is a must have if you are looking to upgrade your charging handle or complete a new build. The handle features the Flat latch which increases safety by inhibiting harmful blowback gases and oil particles from striking the shooter's face and glasses. The PRI Gas Buster charging handle is constructed of T7 7075 hard coat black anodized aluminum with a steel latch. Handle does not work on Rock River 308s.