The Vortex Venom Red Dot 3 MOA is a microsight that can be mounted on different guns incuding pistols, ARs, and shotguns. Powered by a CR1632 battery with the power and dot intensity controls are conveniently located on the left side of the unit. Tom's Airsoft Channel takes a look one in this video... "Hey guys, today a little review of the Vortex Venom Red Dot 3 MOA. Also the first little attempt at voice over."