Features: Closed red dot sight with 100000+ hr battery life Designed for modern MSR platforms and shotguns Comes standard with solid lens covers and 1/2 hex bolt mount 100000+ hr battery life and the readily available CR123A battery is side loading for quick battery replacement Unlimited eye relief to acquire aiming point and target, regardless of eye position behind sight MOTAC (motion activated illumination) powers up or down when sensing motion Uses an ultra-efficient red LED illumination for daylight visibility and extended runtime Strong, lightweight aircraft-grade 7075 T6 aluminum housing 10 daytime/2 NV illumination settings 50000 hr run time 1.535 inches mount height