The Aimpoint® Micro H-2 Red Dot Sight was designed for shooters who demand hardcore durability to withstand all types of environmental conditions. High strength, reinforced aluminum housing with recoil-absorbing mount and flip-up lens covers is ruggedly built to come right out of the box and get to work. Designed to employ both eyes open aiming you'll use your natural eye movement to remain fixed on a moving target and retain awareness of the surrounding area. ACET technology creates 50,000 hours of constant operation on a single battery. And despite its two-fisted toughness, the Micro H-2 weighs in at just 5 oz.…you'll barely notice its mounted on your firearm until you lock on target.