TacFire Tanker Muzzle Brake Black Oxide Steel With 5/8"-24 tpi Threads 2.76" OAL 1.37" Diameter For 308 Win Tanker Style Muzzle Brake Is Made Of All Steel Construction With a Heat Treated, Erosion Resistant Black Oxide Finish. It Comes With a .308 5/8"X24 Thread Pitch. Reduces Recoil And Barrel Whip. This Brake Is Perfect For Rifles Threaded In 5/8X24 Thread, And Are commonly Used For The following Calibers: .308 Winchester, .243 Winchester, .300 Wm, .30-06, .270 Winchester, .300 AAC (Black), 6.5 Creedmoor Model: Tanker Muzzle Brake Material: Steel Thread Pattern: 5/8"-24 tpi Finish: Black Oxide