Sig Sauer Romeo-RS Pro 3 MOA Red Dot Sight

The Sig Sauer Romeo-RS Pro is a compact, pistol-mounted red dot built around a reinforced steel chassis molded into a high-strength polymer housing. It uses a point source LED and an aspheric glass lens to present a clear dot reticle and includes motion-activated illumination (MOTAC) and a side-mounted control for brightness. The optic accepts a side-load CR1632 battery for service without removing the unit from the firearm and is produced using SIG Sauer's updated PRO footprint.

Key Specifications

• The dot measures 3 MOA for a defined aiming point.
• The clear aperture (objective) is 31 mm for an unobstructed sight picture.
• The optic provides 1x magnification for true, unmagnified aiming.
• The overall length is 1.83 inches.
• The weight with battery installed is 0.94 oz.
• Power is supplied by a CR1632 battery (side-load tray with security screw).
• Battery life is specified as at least 20,000 hours at medium brightness (dot-only).
• Illumination offers 8 brightness settings.
• Total windage and elevation travel is 70 MOA.
• Mount type is listed as Delta Point Pro / PRO footprint.

The Romeo-RS Pro combines a reinforced steel chassis, an aspheric lens and a compact footprint intended for pistol mounting. Its side-load battery tray and large side control simplify on-gun adjustments while MOTAC helps conserve battery life. Designed and assembled in the USA, this optic offers a practical balance of size, runtime and user-focused features for shooters who prefer a compact reflex sight configured for modern pistol platforms.