The CAM-LOK� (Covert Application Mount-Locking) is a universal QD piston system comprised of two parts the piston and the barrel adapter. This product page is for the piston (bronze color part that is installed in the suppressor). - The Griffin Armament CAM-LOK� interface affords the user the ability to convert the suppressor to a much faster and more secure mounting solution on browning style action (tilt barrel) pistols vs it's legacy technology single piece direct thread piston counterparts. This system provides a rapid secure attachment to the host pistol. Direct thread single piece pistons have several negative attributes. They do not accept tools and are hand tightened to the host firearm. As a result of hand installation they loosen when the piston system reciprocates under slide cycling during the firing sequence. This vibration and inadvertent loosening of pistol silencers requires end users to constantly check tighten pistol silencers. This periodically causes users to have bad range days with unforeseen baffle strikes and end cap strikes. These unfortunate events cause logistically burdensome work for consumers to communicate with service departments ship products back and forth and sometimes assume charges for repair for these issues. - No longer do users need to worry about their pistol suppressors loosening during use (as with traditional fixed direct thread pistons). The CAM-LOK� system supports a 3/4 socket wrench for installation with prevailing torq