Chamber the sightmark 300blk (7.62x35mm) boresight in your rifle like a regular cartridge and a red laser dot shows exactly where you're aiming.Range for sighting is 15-100 yards, with an operating temperature at -10 to 50 f/c.Ideal for hunters, competitive shooters and law enforcement, this device significantly reduces wasted cartridges and shells.Includes a carrying case and three ag3 batteries.

Caliber: 300 Blackout
Style: Laser
Material: Brass
Battery: 3 AG3