GRIFFIN UNIVERSAL PISTON SIG SAUER SRD 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 torque, and features a taper lock system, which encourages secure attachment, despite the piston still actuating for and aft during the firing sequence. The piston can be attached / detached in any one of three, 120 degree positions, ensuring there are no "false positive" interfacing positions to slow deployment of the suppressor onto the host firearm. Additionally, the manufacturing accuracy of the interface is held to Griffin Armament's high quality standards for squareness, and concentricity, ensuring that each mounting position has similar and minimal POI shift influence. To support this, the mating pistons have all mating diameters and interfacing geometry qualified in a single operation, for tool quality accuracy and perfection. A similar manufacturing theory was applied to the barrel adapter for maximum alignment accuracy. End users benefit from being able to attach their silencer to various adapter interfaced host firearms, without having to disassemble the suppressor and change the piston to a different thread pitch. The CAM-LOK™ pistons are "universal"; accommodating any pistol mounted with a 3 Lug CAM-LOK™ barrel adapter. Additionally, end users with different brand suppressors supported by the CAM-LOK™ piston family, will be able to benefit from the interchangeability of CAM-LOK™ barrel adapters between piston models. Features : Patented CAM-LOK™ (Covert Application Mount-Locking) universal QD piston attachment system 3 mounting positions, 120 degrees separated for rapid mounting Internal taper surface locks in place with interfacing barrel adapters and drastically reduces or eliminates common baffle/end cap strikes Compatible with Universal QD pistons barrel adapters (sold separately) Total system weight is identical to legacy direct thread pistons H900 heat treated for improved durability and wear resistance 17-4 stainless steel material