I just bought a used Walther P22 and since I have no plans to buy a suppressor for a .22, so this is up for sale, lest I be tempted to fill out a Form 4.
Its a Gemtech thread adapter for the P22 to allow the use of a suppressor. 1/2-28 threads. Includes adapter, thread protector cap. Selling for $45 + $6 shipping on Gemtech's website. So I will ask $40 shipped or $35 picked up in Mesa, AZ.