A quick detach .22 caliber suppressor that locks into place with a 5 lug type adaptor that threads to the factory barrel on a Walther P22 or Sig Mosquito. Adaptors are supplied with the suppressor and are available in the standard ½” x 28 thread as well as the SIG metric thread. A perfect suppressor for the Beretta 21 pistol that has had barrel threaded. 1” OD x 5” length. Specify thread pitch when ordering.