The Griffin Armament Universal Piston for AAC suppressors features the patented CAM-LOK(TM) (Covert Application Mount - Locking) interface system providing a faster and more secure mounting solution for browning style action pistols compared to traditional direct thread pistons.Griffin Armament Universal Piston AAC CompatiblePatented CAM-LOK(TM) universal QD piston attachment system3 mounting positions 120 degrees separated for rapid mountingInternal taper surface locks with barrel adapters to reduce baffle/end cap strikesCompatible with Universal QD piston barrel adapters (sold separately)17-4 stainless steel construction with H900 heat treatmentIdentical weight to legacy direct thread pistonsThis advanced piston system delivers rapid secure attachment to host pistols while maintaining the durability and performance expected from Griffin Armament suppressor components.