KALIBRGUN BARREL 1/2 x 20 UNF Adaptor
This adaptor allows you to connect any standard 1/2 x 20 UNF moderator to your rifle barrel.
This unit comes with internal m14 thread and O-ring installed inside the unit for tight seal.
Will fit to 177, 22 , 25 and 30 caliber.
(no tools required)