Firearms – Muzzle making – attaching or repair
Patent
1995-07-10
1997-08-19
Johnson, Stephen M.
Firearms
Muzzle making, attaching or repair
33245, F41G 138
Patent
active
056575718
ABSTRACT:
The present invention discloses a vertical position indicator for the correction of roll axis sighting errors in firearms equipped with optical sights.
REFERENCES:
patent: 2308635 (1943-01-01), Walker
patent: 3556666 (1971-01-01), Lichtenstern
patent: 5005308 (1991-04-01), Parks
patent: 5223650 (1993-06-01), Finn
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