Firearms – Barrels – Rifling or lining
Patent
1994-02-04
1994-11-01
Johnson, Stephen M.
Firearms
Barrels
Rifling or lining
42 7602, 89 16, F41A 2104, F41A 2118
Patent
active
H00013650
ABSTRACT:
A new hybrid gun barrel can be successfully used with modern hotter propellants without unacceptable erosion of the breech section of the gun barrel and while retaining the accuracy and ballistic characteristics of a fully rifled gun barrel. The gun barrel comprises a smooth bore breech section and a longer gain twist rifled muzzle section. The smooth bore breech section can better withstand the high heat and pressure of modern hotter propellants than prior art rifled breech sections. The smooth bore breech section will always be less than one-third the total length of the gun barrel and preferably less than one-fifth the total length of the gun barrel. It can be made of a different material than the rifled muzzle section and can be coated with a material harder than the rest of the gun barrel.
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Amspacker Michael R.
Finello Duane
Zummo Nunzio
Johnson Stephen M.
Kundert Thomas L.
Sinder Fredric L.
The United States of America as represented by the Secretary of
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