Sig Sauer ROMEO4T-PRO 1x 20mm FDE Red Dot - Quad Ballistic Circle Dot - Designed for modern semi-automatic pistols, MSR platforms and shotguns Short and medium range engagements and recreational shooting across a wide range of calibers and light conditions. Designed, built and tested for hard, professional use; Engineered lens coatings for elite performance in bright light or NV; Top mounted activation with NV Override control; Quad Ballistic Circle Dot; Durable half-inch hex mount; 9 Daytime settings, 3 NV settings; 3 mounting heights come standard in the box; Includes clear flip-backs, opaque front flip back, and ARD Kill-Flash; 50,000 hr runtime with CR2032 Battery and MOTAC; Assembled in USA;