Golden Eye Tactical 1x30 Red Green Dot Sight with Cantilever Mount by 4 MOA Green/Red dot w-lower cowitness 1/3 cantilever mount Rugged aluminum construction endures impact/recoil,dimensions: 5.60" x 1.45",weight: 7.20-ounce Cantilever Weaver Style Mount for mounting onto most Weaver Style/Picatinny rails Nitrogen-filled fog/waterproof performance,elevation & Windage adjustment option 10 x Brightness levels (2 levels are specific for night vision),12-Hour battery life (auto-shutdown mechanism)