Zero your optics while conserving ammunition with the NcSTAR 7.62x39mm Laser Bore Sighter. Designed to ensure a precise fit within your rifle's chamber, this red laser bore sighter is pre-aligned for superior accuracy. The aluminum body is durable yet lightweight, while the simple-to-use design ensures a frustration-free performance you can depend on. Simply install the batteries to activate the laser and remove the batteries to deactivate it; it's that simple! Powered by a 635-655nm, <5mw, Class IIIa red laser. Includes batteries.