Description- Designed for modern MSR platforms and shotguns - Comes standard with solid lens covers and 1/2 hex bolt mount- Ballistic Circle-Dot reticle options- Users can select from 4 different integrated reticle options (Dot, Circle-Dot, Dot with Holds, Circle-Dot with Holds)- 100,000+ hour 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 - 1.535" Mount Height- Strong, lightweight aircraft-grade 6061-T6 aluminum housing - Waterproof, IPX-7 rated, and fog-proof. Sig Sauer Romeo8H Red Dot Sight Ballistic Circle Dot 0.5 MOA Hex Bolt Mount Black SOR81001