For use only with the Omega 36M and Hybrid 46M. This mount is used to attach your silencer to handguns when used with a piston. A separate piston is required for this mount. Quality pistons in a variety of thread patterns are sold separately - CLICK HERE With the Spring and Piston removed, a 3-Lug mount can be inserted into the threads of the Charlie Piston Mount, allowing for use of a 3-Lug Mount with the Omega 36M, and the Hybrid 46M. SKU: AC4751