by Bushnell
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This Bushnell 740001C Magnetic Boresighter is a precision optical tool designed to speed up and simplify the sighting-in process for rifles, shotguns, and handguns of virtually any caliber. It magnetically attaches directly to the muzzle of a firearm, eliminating the need for interchangeable arbors, so users can quickly align their optic's reticle to the barrel, saving both time and ammunition. The device features a precision-etched glass grid reticle, visible through the scope at any magnification, allowing for intuitive crosshair alignment. Its rugged, all-metal construction ensures reliability, while the strong magnet keeps the device firmly in place even on heavy barrels, minimizing setup wobble and error. The universal compatibility—from bolt-actions and AR-platform rifles to pistols and shotguns—makes this a versatile addition to any shooter's range bag, especially when switching optics or confirming zero between outings.
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An analysis of AR-15 optic mounting heights, how height-over-bore affects zero offset and holdovers, and the tradeoffs between absolute co-witness, lower-third, and taller mounts.
6 min read
Guide
A high-level overview of the main optic categories, explaining tradeoffs between speed, versatility, and precision for AR-15 builds.
7 min read