Aimpoint compm5s - Aimpoint CompM5s 1x18mm AR-15 Ready Reflex Red Dot Sight

operation is dummy proof. If its bright outside rotate the brightness selector to the 7th click. else position 6 or 5. The lens covers are built in and maintain long term lens protection. The battery is good for over 5 years of use at level 7. The battery compartment is low in the weapon to allow better vision past the sight. Uses a AAA battery. 150 feet water proof. Accurate and feelable red dot target adjustment. What else could you want from a red dot. It is compatable with the Eotech magnifier and am able to hit half silloette at 300 yards easily.