Achieve pinpoint accuracy with ease using the Aim Sports Brass Cartridge Laser Boresighter expertly crafted for .30-06 Springfield .25-06 Remington and .270 Winchester calibers.Designed for shooters who value precision and efficiency this cartridge-style boresighter simplifies the sight-in process while saving time and ammunition.Constructed from durable high-quality brass the boresighter mimics the exact dimensions of a real cartridge for a snug and secure chamber fit.Just insert the unit into your firearm like a standard round and a powerful 5mW red laser projects a bright visible dot downrange-making optic and sight adjustments fast accurate and frustration-free.Powered by a compact LR41 battery (included) this lightweight tool is perfect for range days pre-season hunting prep or routine scope maintenance.Its multi-caliber compatibility offers added convenience for those with multiple rifles in similar calibers making it a must-have addition to any serious shooter's toolkit.Features / SpecsAim Sports Inc.PJBS3006Red Laser Bore Sight Tool5mW Red Laser435/355NM WavelengthLR41 Battery TypeSits inside chamberAllows you to adjust Iron Sights/ScopesPerfect for Sighting InBrass CasedNatural FinishFits Firearms Chambered in:.30-06 Springfield.25-06 Remington.270 Winchester