Burris 300235 FastFire 1x 21x15mm Obj Unlimited Eye Relief 3 MOA No Mount Black Matte

The FastFire III Reflex sight is light, small and tough, placing a powerful bright red 3 MOA dot on the target. It has three manual brightness settings and an automatic brightness setting with a top-mounted battery (CR1632), and upgraded windage and elevation adjustments. The steel body construction is for extreme durability and is waterproof and shockproof. The ultimate CQB sight is great for mounting on a pistol, shotgun or rifle.