Sightmark 300 AAC Blackout Boresighter — Red Laser

The Sightmark 300 AAC Blackout boresighter provides a quick, non-live-fire method to establish an initial zero for firearms chambered in .300 AAC Blackout / 7.62x35mm. It chambers like a regular cartridge and projects a red laser dot to indicate point of aim for scopes and iron sights at practical sight-in distances. The kit ships with batteries and a padded carrying case for field use.

Key Specifications

• Compatible chamber: .300 AAC Blackout / 7.62x35mm.
• Laser color: red for clear daytime and low-light reference.
• Sighting range: 15–100 yards for initial non-live-fire alignment.
• Battery power: uses three AG3 cells (included).
• Material: brass construction for the cartridge body.
• Finish color: black.
• Included accessories: battery pack and carrying case.
• Operating temperature reported as: -10 to 50 F/C (as listed by manufacturer).
• Package dimensions reported as: 1.00 x 5.00 x 7.50 (units not specified in source data).
• Reported weight values: 0.1188 (unit not specified in source data).

This boresighter streamlines the initial sighting process so you can spend fewer rounds at the range and more time refining your zero or practicing. Its cartridge-style design and included accessories make it a practical tool for hunters, competitive shooters, and range users who want a straightforward, repeatable starting point for sight adjustments.