Sightmark 12ga Boresight

The Sightmark 12ga Boresight is a laser-based sighting tool designed to eliminate the guesswork from shotgun zero without firing a round downrange. Chamber the boresight like standard ammunition, and a visible laser dot projects the exact point of aim, allowing shooters to verify scope or sight alignment before live-fire confirmation. This approach significantly reduces ammunition waste and range time during the initial sight-in phase.

For 12-gauge shotguns, the boresight method provides a fast reference point across all barrel configurations—whether cylinder bore, modified choke, or fully rifled slug barrels. The laser sight picture reveals fundamental alignment issues (canted mounts, misaligned beads, or scope problems) before heading to the range. Once the boresight confirms zero, live fire becomes a fine-tuning exercise to account for ballistic drop, shot pattern characteristics, and individual gun variables rather than a complete starting-from-scratch process. The compact 5 x 1 x 7.5-inch form factor and 0.19-pound weight make it easy to transport and store alongside range gear.

Tactical teams, competition shooters, hunters, and law enforcement personnel benefit from this efficiency gain. Slug shooting, buckshot patterns, and defensive shotgun configurations all require initial alignment verification; the 12ga boresight accelerates that critical first step. Professional armories and training facilities use laser boresights to reduce ammunition consumption during bulk qualification cycles. The tool is equally valuable for field gunsmithing work, troubleshooting zero shift after repairs, or validating equipment changes before committing to live rounds in a duty or match scenario.