GunAlly LASBSI Laser Range Finder

Specification: -Power: <5mW Laser :Class IIIa -T6061 High class aluminum alloy in beautiful black matte -7 bore adjustable adapters to fit all .177-.50 caliber -Screws already are set in the factory when center aligning. -For any 0.177 to 0.50 handguns, rifles, sights and rifle scopes – More convenient and accurate than scope and sight alignment. Easy to Use! – Battery: 1pcs CR2(14250) (no have) – Length: 165mm, Head Dia: 19mm, Tail Dia: 4.2mm