Sig Sauer ROMEO8T 1x Red Dot - Ballistic Circle Dot - Designed for modern MSR platforms and shotguns. Comes standard with solid lens covers and 1/2 hex bolt mount. 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; 1.535in Mount Height; Strong, lightweight aircraft-grade 7075-T6 aluminum housing; Waterproof, IPX-8 rated, and fog-proof.; Removable Titanium Shroud for ultimate optic protection from drops and bumps;