US 12,173,988 B2
Extended range multi-caliber in-bore laser boresight system
Brandon W Rudolph, Bloomington, IN (US); Matthew A Thompson, Bloomington, IN (US); and Daniel S Spoor, Bloomington, IN (US)
Assigned to The United States of America, Represented by the Secretary of the Navy, Washington, DC (US)
Filed by The United States of America, as represented by the Secretary of the Navy, Crane, IN (US)
Filed on Apr. 5, 2023, as Appl. No. 18/131,225.
Claims priority of provisional application 63/328,406, filed on Apr. 7, 2022.
Prior Publication US 2023/0324142 A1, Oct. 12, 2023
Int. Cl. F41G 1/54 (2006.01); F42B 5/02 (2006.01)
CPC F41G 1/545 (2013.01) [F42B 5/025 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An extended range multi-caliber laser boresight system for sighting in a firearm comprising:
a hollow cartridge case comprising an elongated body, an aperture in place of a bullet, an open end, an ejector rim, and a cutout in said body and in said ejector rim;
a laser module comprising a laser diode, focusing optics, and a protrusion; and
an external electronic package comprising a power supply, one or more switches, and circuitry for said laser module;
wherein said laser module fits through said open end and is secured within said hollow cartridge case by mating said cutout with said protrusion;
wherein said laser module is electrically connected to said external electronic package through one or more wires; and
wherein said laser diode produces a visible laser that exits said hollow cartridge case through said aperture for sighting in said firearm.