Rifled gun barrel having smooth bore section

Details Rifled gun barrel having smooth bore section Rifled gun barrel having smooth bore section

1985-10-04

1987-04-28

Walsh, Donald P.

Firearms

Barrels

42 77, 42 78, F41C 2100, F41C 2108

Patent

active

046603123

ABSTRACT:
A gun barrel having a rifled-bore section at the breech end thereof and a smooth-bore section at the muzzle end thereof, the sections having a gas tight connection therebetween, the rifled-bore section comprising a first generally tubular body having a longitudinal bore and at least one spiral groove formed in the wall of the bore to a depth of a predetermined dimension, the rifled-bore section having a length corresponding substantially to the peak pressure point for the gun barrel, the smooth-bore section comprising a second generally tubular body having a longitudinal bore coaxial with the longitudinal bore of the rifled-bore section, and the longitudinal bore of the smooth-bore section having a diameter greater than the diameter of the bore of the rifled-bore section and less than the diameter of the spiral rifling groove.

REFERENCES:
patent: 37193 (1862-12-01), Alsop
patent: 3525172 (1970-08-01), Marshall et al.
patent: 4546564 (1985-10-01), A'Costa
patent: 4570529 (1986-02-01), A'Costa
L. R. Wallack, American Rifle Design and Performance, Winchester Press, New York, 1977.

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