Angular porting system and shotgun barrel equipped therewith

Details Angular porting system and shotgun barrel equipped therewith Angular porting system and shotgun barrel equipped therewith

1995-07-03

1996-12-24

Johnson, Stephen M.

Ordnance

Barrels

Recoil absorbers and climb arrestors

F41A 2136

Patent

active

055875491

ABSTRACT:
A barrel porting system for firearms, preferably shotguns, comprises a pair of rows of spaced apart ventilating orifices. The inclined, oblong porting orifices have radiused ends. They extend through the barrel to vent exhaust gases exteriorly. The porting orifices are defined in the barrel with an EDM machine adjacent the muzzle for ventilating hot gases to effectuate muzzle control. Preferably the orifices are angularly oriented such that each orifice axis forms an acute angle with respect to the longitudinal axis of the barrel. Preferably the latter angle is between 40 and 50 degrees. The preferred system orients the orifices in a pair of rows that are radially spaced apart between 50 and 70 degrees. Angular placement of the orifices vents gases both upwardly and rearwardly, so that resultant vector forces generated by escaping gases are translated into downwardly and forwardly directed components. Resultant downward force minimizes muzzle jump. By concurrently projecting gasses rearwardly, recoil is reduced by the resultant forwardly aimed force. As a result, shooting accuracy is substantially enhanced.

REFERENCES:
patent: 785973 (1905-03-01), McClean
patent: 2662326 (1953-12-01), Powell
patent: 3769731 (1973-11-01), Pachmayr et al.
patent: 4207799 (1980-06-01), Tocco
patent: 4392413 (1983-07-01), Gwinn, Jr.
Webster, Webster's New International Dictionary, Jun. 22, 1950, p. 1680.
Gun World, Cutting The Climb, May 1974, p. 35.

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