Firearms – Muzzle making – attaching or repair
Patent
1991-08-29
1994-08-16
Johnson, Stephen M.
Firearms
Muzzle making, attaching or repair
33247, 33250, F41G 1387
Patent
active
053375068
ABSTRACT:
A sub-base for a gun, such as a semiautomatic shotgun, that has a metal receiver. The sub-base of this invention permits a gunsight, such as a telescopic gunsight, to be removably mounted to the top of the gun's receiver with rigidity sufficient to remain in calibration permamently despite recoil. This substantial rigidity is obtained by fastening the sub-base to both sides of the receiver at their thickest parts and by angling the fasteners to maximize their holding power.
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