Gun leveling device

Apparatus for controlling muzzle jump or recoil of a pistol or revolver having a barrel with grooves forming a rifled bore and a shroud with a bore and fitting about the barrel comprising;

• means forming a plurality of radially directed passages extending through the wall of the barrel,
• said passages terminating at their inner ends in openings on the inner surface of said barrel, said openings extending parallel to the direction of said grooves,
• means forming a channel only in the bore of the shroud to form an expansion chamber between the barrel and shroud and positioned to communicate with the plurality of radially directed passages, and means defining at least one orifice in the upper portion of the shroud extending from the channel to communicate from the chamber to the atmosphere
• means for reversing the gas flow in the expansion chamber including said passages disposed at and communicating with a front end of the expansion chamber and said at least one orifice disposed at and communicating with the rear end of the expansion chamber,
• the maximum longitudinal distance between said passages and said orifice being greater than the circumferential distance between said orifice and an adjacent passage.