AIMSHOT Laser Boresighter w/Ext Battery Box 17 HMR Brass

AIMSHOT Laser Boresighter with Ext Battery Box for .17 HMR Brass. The bore sight projects a 650 nm laser down the bore to help align sights, optics, and lasers. The external battery box extends battery life to 28 hours and doubles as a storage container for the boresight when not in use. This model fits .17 HMR and can be used with arbors (sold separately) to adapt it to many pistol calibers. Specifications and features: Wavelength 650 nm; Output power less than 5 mW; Battery 2 AA; Battery life 28 hours continuous; Construction brass bore sight, plastic battery box; Integrated magnet attaches battery box to firearm while sighting in; Minimum sighting range 3 yards; Maximum sighting range 100 yards; Fits .17 HMR.