HUXWRX Booster Assembly 1/2x28 Black. The Booster Assembly simply mounts to the back of your pistol suppressor and then can be threaded directly to your pistol barrel. The RAD 9 and 45 ship with a booster assembly. The CAH 9k ships with a direct thread adapter and will require the Booster Assembly to be used with pistols with reciprocating barrels. Specifications for HUXWRX Booster Assembly: Manufacturer: HUXWRX Color: Black Package Contents: HUXWRX Booster Assembly HUXWRX 2243: Booster Assembly 1/2x28 Black