1.Green laser sight with W/E adjustment screws, 2.fits any 20mm weaver/picatinny rails 3.pistol laser,accurate sighting Pistol green laser sight GF014HG,Size(Lxφ):86mmx25.8mmOutput power:10mW,battery:CR2 3V;wavelength:532nmStraight cord W/ Momentary pad switchHigh quality,fit any 20mm weaver rail or picatinny rail,