Designed for hunters competitive shooters and tactical professionals the Sightmark 12 Gauge Laser Boresighter is the ultimate tool for fast precise sight-in and zero checks.Engineered for simplicity and performance this in-chamber brass boresighter provides a quick and cost-effective solution for aligning your shotgun optics-without wasting time or ammunition.Crafted from durable high-quality brass the Sightmark boresighter fits directly into your shotgun's chamber ensuring reliable alignment and a secure fit every time.Once installed its powerful red laser projects a clear 2-inch dot at 100 yards helping you achieve precise bore-to-reticle alignment for scopes red dot sights or iron sights.Perfect for initial sight-ins post-transport zero checks or even as a training tool for quick-draw drills the Sightmark 12 Gauge Laser Boresighter adds unmatched efficiency and versatility to your shooting gear.Compact and easy to transport it includes a protective carrying case three AG13 batteries and easy-to-follow instructions for immediate hassle-free use.Need new range accessories? Save big when you shop our online selection of Firearm Cleaning Supplies.