The KAK Plan B AK74 Muzzle Brake features an innovative taper and thread design for repeatable lockup and proper seal with suppressor adapters. Constructed from 17-4 stainless steel with a durable nitride finish.KAK Plan B AK74 Muzzle BrakeM26x1.5LH threading for AK74 pattern riflesCompatible with 5.56 and 7.62x39 calibersOverall length: 2.55" with 1.55" blast chamber protrusionWeight: 3.5 oz17-4 stainless steel construction with nitride finishPlan B suppressor hub compatibilityInstallation multi wrench includedDesigned for seamless integration with Plan B suppressor systems this muzzle brake provides reliable performance and easy suppressor attachment for AK74 platform rifles. Recommended installation with Rocksett at 20-25 ft-lbs of torque.