Spikes Tactical Ar-15/M16 22lr Pistol Plug
Machined aluminum plug screws into the lower receiver to seal off the extension tube opening on AR-style pistols in .22 LR rimfire. Black anodized plug accepts a pushbutton quick-release sling swivel (not included), and requires no fitting or modification to the gun. Mfg: Spikes Tactical SPECS: Aluminum, matte black anodized. .835" (21mm) OAL. 1.365" (34.6mm) O.D. Works only on guns that require no receiver extension tube.