Steel adapter allows you to install muzzle brakes and flash hiders on an AK -47 tactical rifle with an un-threaded barrel. No machining necessary. With three machined set screws it can be secured to barrel easily. Adapter features 14mm-1.0 (LH) left hand threads for 7.62x39 caliber AK-47 and SKS rifles. Outside diameter of the barrel must be .54 or THINNER to fit into the adapter. Adapter hole for the bullet is only .343" Fits Sam 7K non threaded barrels.
