Original WWII German Panther Muzzle Brake for Panther, Pz lV. Muzzle brakes alter the direction of gases as they exit the barrel of a gun that has just been fired. This produces certain effects on the gun and how the gases and flash disperse that the user of the gun may find desirable (or, for that matter, undesirable). You have probably heard of a pistol "silencer" used by assassins in fiction. A muzzle brake may be thought of as a variation on a gun silencer, though they have different effects and purposes. Theoretically, you may put a muzzle brake on any barrel, but some barrels will never have a muzzle brake for reasons we will get to below. This Muzzle Brake is working condition, original color.