US Ship for CVLIFE .22 to .50 Caliber Rifle Gauge Boresight Red Dot Laser Boresighter Bore Sighter(Black) Allows for quick and accurate resetting of any sights, Simply choose the caliber adapter and place the laser unit in the muzzle. Caution: Avoid direct eye exposure to beam; Fits any .22 to .50 caliber rifles, handguns, and scopes. Windage and elevation adjustable; Long sighting range; Light weight and durable; Tools, four adapters, and extra batteries (three in total) all included. The mW of the laser product 5mW Max. Output Power less than 5mW; Weight 38g; Material Aluminum; Length 155 mm; Length of rod that fits in the barrel: 60mm - 90mm (tapered). Great Quality, Affordable Price. Head Diameter: 16mm; Tail Diameter: 5mm; Laser wavelength 635-655nm; Laser Color Red; Power 3x AG13 batteries. 12 Month Warranty and Easy to Get Support.