Sightmark Boresight Features The Sightmark Boresight projects a 5mW red laser at 632-650 nm wavelength that creates a 2 dot at 100 yards for precise bore sighting across a 15-100 yard effective range allowing shooters to get on paper quickly and reduce ammunition expenditure during initial zeroing sessions on 12 gauge shotgun platforms. Brass construction provides durable corrosion-resistant performance in field and range conditions for a boresight that maintains its dimensional integrity across repeated insertion and removal from the 12 gauge chamber. Three included AG13 batteries deliver 1 hour of continuous laser runtime for extended bore sighting sessions without requiring a mid-session battery change. The 12 gauge red laser boresight is purpose-built for hunters competitive shooters and law enforcement professionals who want fast accurate shotgun bore sighting without the ammunition cost and time investment of traditional live-fire zeroing methods. A carrying case is included for organized storage and protection of the boresight and battery pack between uses at the range and in the field. The 15-100 yard effective range covers the practical bore sighting distances for most 12 gauge shotgun applications across hunting competition and duty configurations. Sightmark Boresight Specifications Manufacturer: Sightmark Model: Boresight Gauge: 12 Gauge Material: Brass Laser Color: Red Wavelength: 632-650 nm Output: 5mW Dot Size: 2 at 100 yds Range: 15-100 yds Battery: AG13 Battery Life: 1 Hour Includes: AG13 Battery Pack Carrying Case