SilencerCo's threaded barrel replaces the standard barrel with a threaded barrel. It is precision machined from heat treated 416R stainless steel. This barrel is compatible with the Glock 22 chambered in 40 Smith & Wesson. It features 9/16"x24 muzzle thread, a 1:10" twist rate, and a durable, corrosion resistant matte black nitride finish.