Ultradyne USA Vostok Compensator Muzzle Brake, AK, 7.62x39, M14x1 LH Thread, .750 Outside Diameter, 416 SS, Black Nitride Finish UD10870 High quality components and precise manufacturing make Ultradyne parts ideal for maintaining and upgrading firearms. The durability" reliability and excellent build quality of these parts will ensure years of service you can count on.