This machined 7.25" inch Barrel extension takes its looks from the Browning 1919 machine gun barrel. It can be permanently attached to extend the barrel to rifle length for compliance. Threaded 1/2x28 for AK-47s with 1/2x28 threaded barrels and provides more accuracy and gives your weapon a more tactical look. It also acts as a counter weight and aids to keep the muzzle down under rapid fire. With 9 machined ports at the end, it acts as a muzzle break as well. Finished in Flat/Matte Black, ID is .45"