The MBS-1 LaserLyte Laser Bore Sighter incorporates LaserLyte's patented one-piece design and caliber-fitting systems. This easy-to-use product can get a shooter within three to four inches of the bullseye at 100 yards in about three shots. Constructed from tough T6 aluminum, the Laser Bore Sight comes in a sleek red finish and works great on any weapon (22-50 caliber) with at least three inches of barrel length. The red laser has a 500 yard range at night. The Laser Bore Sight makes sight-in sessions a breeze for scopes, lasers or iron sights on any firearm from .22 to .50 caliber with the four included adapters. The Laser Bore Sight activates with a roll switch and is powered by three 393 batteries for 1.5 hours of continuous use. This unit is also for modern rifles and its modest design works great with most flash suppressors and muzzle brakes.