Browning Sporter Recoil Hawg Muzzle Brake .30 Caliber Rugged Smoked Bronze. It reduces muzzle jump significantly to keep the target in your scope. The Sporter Recoil Hawg will fit most sporter contour rifle barrels with an M13 x 1.25 or M13 x .75 threaded muzzle. The Sporter Recoil Hawg fits X-Bolt Speed and Sporter models of X-Bolt/X-Bolt 2 rifles. Specifications for Browning Sporter Recoil Hawg Muzzle Brake: Manufacturer: Browning Projectile Caliber: .30 Caliber Length: 2.2 in Weight: 2 oz Condition: New Width: 0.8 in Features of Browning Sporter Recoil Hawg Muzzle Brake Multi-port design reduces felt recoil up to 76percent (depending on caliber) Top and side ports direct gases to reduce muzzle rise Closed bottom design helps reduce dust signature during firing Rugged all-steel construction Multi-caliber design that is suitable for rifles that are .30 caliber or smaller. Package Contents: Browning Sporter Recoil Hawg Muzzle Brake Browning 1293088: Sporter Recoil Hawg Muzzle Brake .30 Caliber Rugged Smoked Bronze