Designed for MSR platforms and shotguns. Unlimited eye relief to acquire aiming point and target, regardless of eye position behind sight. Slim design for low profile footprint. MOTAC (Motion Activated Illumination) powers up or down when sensing motion. Uses an ultra-efficient red LED illumination for daylight visibility and extended runtime. Spectra coat highly efficient, ultra-wide broadband, anti-reflection lens coatings reduce surface reflections to extremely low levels across the entire visible spectrum providing superior light transmission. Stealth ID industrial design inspired by our legendary firearms; deflection armor trapezoidal surfacing breaks up the shape and visibility of the optic along with pistol slide serrations and grip checkering to add function to the form. 1. 535-inch Mount Height. 100, 000+ hour battery life and the readily available CR123A battery is side loading for quick battery replacement. Lasts up to 10 years. Strong, lightweight aircraft-grade 6061-T6 aluminum housing. Dependable waterproof (IPX-7 rated for complete water immersion up to 1m), and fog proof performance. Comes standard with solid lens covers and 1/2 hex bolt mount.