Tough and built like a tank, the Sig Sauer ROMEO4 red dot sight is fast, accurate, and a great representative of Sig Sauer quality. For close quarters battle (CQB), competition, or even hunting dangerous game when milliseconds count, count on the ROMEO4 to get rounds on target as fast as possible. ROMEO4 red dot sights come in the following varieties: ROMEO4A 1x20MM 2MOA RED DOTROMEO4B 1x20MM 2MOA RED DOT WITH CIRCLE DOTROMEO4C 1x20MM 2MOA SOLAR RED DOT WITH CIRCLE DOTROMEO4M 1x20MM 2MOA RED DOT WITH CIRCLE DOT | RUGGEDIZEDROMEO4 red dot sights also incorporate these features: MOTAC - Motion-sensing technology immediately powers up illumination when motion is detected, and powers it down when it does not - saving battery life and ensuring power is there when needed. Stealth ID - the industrial design of Sig Electro-Optics is based on their legendary firearms; deflection armor trapezoidal surfacing breaks up shape and pattern of the opticSpectracoat - Highly efficient, ultra-wide broadband, anti-reflection lens coatings minimize reflection across the spectrum of visible light, while still permitting maximum light transmission through the scopeSig Optics Infinite Guarantee - They're guaranteed forever - an unlimited lifetime guarantee. Fully transferable, no warranty card or receipt required. Period. Sig Sauer ROMEO4T Red Dot Sight 1x20 2 MOA Circle Dot Hex