Yankee Hill Machine Walther P22 Barrel Accessory Mounts attach to the end of your barrel. This mount allows you to mount 1/2 inch - 28 standard thread muzzle accessories. Common muzzle accessories that are mounted are suppressors, Flash hiders, and golf ball launchers. Each barrel accessory mount comes with a thread protector so you neve have to worry about the threads. Go mount those muzzle accessories with this Walther P22 Barrel Accessory Mount.