SIG ROMEO8T RED DOT BALL CIRCLE DOT FDE 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 7075-T6 aluminum housing Waterproof, IPX-8 rated, and fog-proof. Removable Titanium Shroud for ultimate optic protection from drops and bumps