UTG LS750 laser & M4/15 front sight tower A2 square post assembly Class IIIA red laser 80cm@10m beam movement 2.5 to 3.1mW output 630 to 640nm wavelength 15 to 20mm beam diameter at 15m 14 deg. F to 113 deg F operating temperature 500m range Windage and elevation adjustments TS platform/smart spherical structure 80 mins. battery life 6000 hrs laser life 2.64" long 3.2 oz. with batteries Includes pressure switch & four (4) LR44 batteries