If you want to get the full fun value out of your Walther P22 handgun by being able to mount any 1/2x28 TPI threaded accessories such as a SUPPRESSOR, a FLASH HIDER from an AR15 or one of Tactical Innovations Inc.'s UNRESTRICTED FAKE SUPPRESSORS, then this is the part that you need. This thread adapter easily replaces the factory barrel nut using Walther's factory supplied barrel wrench and works equally well on 3.4" and 5" guns. (However, it will not work on CA non-threaded guns.)
Tactical Innovations Inc. manufacture literally 1000's of Walther Thread adapters for other firearm manufacturers. The Walther P22 Thread Adapters are CNC manufactured to precision tolerances from solid steel rod (NOT aluminum) in one CNC lathe operation to ensure exact thread alignment and are hot salt blued to match your P22 pistol. Each retail packaged adapter assembly consists of one adapter and one knurled OD thread protector.