SPECS: Aluminum housing, hard anodized, gloss black finish. Laser – Class IIIa, 5mw max output. Standard Kit - Bore sighter: 6” (15.2cm) long, .625” (1.6cm) diameter at head. Kit also contains adjustable Delrin adapters with mounting screws, three A-76 batteries, hex wrench, daylight laser target, and complete instructions. Fits .22 to .50 caliber gun with 4” or longer barrel. Deluxe Kit - Includes contents of Standard Kit plus shotgun adapter and laser scope leveler. Fits .22 to .75 caliber gun with 4” or longer barrel, plus 12/16/20 gauge shotguns. Kryptonyte Deluxe Kit - Boresighter: 7½” (19cm) long, .740” (1.9cm) diameter. Kit includes same accessories as Deluxe Kit, except daylight laser target which is not required. Also includes CR2 lithium battery and hard plastic storage case.