The Griffin Armament CAM-LOK (Covert Application Mount - Locking) Universal piston system is comprised from two parts, the piston or CAM-LOK direct thread adapter, and the barrel adapter. This product page is for the barrel adapter. 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 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" w...