Griffin Piston 1-2x28

These Pistons are required for use with the Revolution and Resistance 9 and 45 silencers and for the Optimus in the pistol configuration" it is important to intermittently clean and lubricate the exterior of the piston to ensure smooth reciprocation with the O ring in the piston retainer. O-Rings should be replaced intermittently when worn to ensure alignment of the silencer with the booster assembly. Failure to replace damaged or worn O-rings could result in a baffle strike or damage to the piston components.Features : The piston are H900 heat treated with a rust inhibitor "Please note" color and color pattern will vary due to the heat treatment."