muzzle braken.Firearms a device fitted to the muzzle of a gun to redirect the forces of recoil upon firing and make the weapon more controllable.
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1942 W. LeyShells & Shooting i. 29 (caption) Muzzle brake. Originally developed by Schneider at Le Creusot, it is now widely used on anti-tank guns of all armies.
1992 Soldier of Fortune Oct. 12/2 (caption) Even with muzzle brake removed, geer found recoil manageable.