SIG SAUER ROMEO-RS CMPT CIRCLE DOT BLK

SIG SAUER ROMEO-RS Compact Circle-Dot Reflex Sight

The SIG SAUER ROMEO-RS Compact is a lightweight open reflex sight designed for compact and slimline pistols that use the Shield RMSc mounting footprint. This black circle-dot model combines a 2 MOA center dot with a 32 MOA outer circle, giving the shooter a precise central aiming point and a larger visual reference that can be easier to acquire quickly. The reticle can also be configured as a dot alone or circle alone, allowing the display to match the user’s preference and shooting application.

Manufacturer part number SOR02100 identifies the black ROMEO-RS Compact with the red selectable circle-dot reticle. The optic uses a hybrid construction that places a skeletonized steel chassis within a high-strength molded polymer housing. This approach keeps the sight compact and light while reinforcing the structure around its optical system. A molded-glass aspheric lens provides a clear 24mm aperture in a package that weighs only 0.75 ounce with the battery installed.

Selectable Circle-Dot Reticle

The circle-dot version offers three display choices: a 2 MOA red dot surrounded by a 32 MOA red circle, the 2 MOA dot by itself, or the 32 MOA circle by itself. The control button is used to enter reticle-selection mode and cycle among the options. The sight remembers the last reticle and brightness setting used, so the selected display returns when the optic is powered back on.

Eight brightness settings allow the reticle intensity to be adjusted for changing light. SIG’s Motion Activated Illumination system, commonly called MOTAC, shuts the illumination down after approximately two minutes without movement and restores it when motion is detected. This reduces unnecessary battery use without requiring the optic to be manually switched on every time it is moved.

Compact Dimensions and Side-Access Battery

The ROMEO-RS Compact measures approximately 1.61 inches long, 1.12 inches wide, and 1.10 inches high. Its clear aperture measures 24mm, and its weight is approximately 0.75 ounce with the battery. These dimensions help preserve the compact handling characteristics of a compatible carry pistol while adding an electronic aiming system.

Power comes from one CR1632 battery housed in a side-mounted tray. Side access lets the battery be serviced without removing the optic from the slide, helping preserve the installed position and established zero. The exact SOR02100 variant is rated for a minimum continuous runtime of 20,000 hours at a medium brightness setting when operated in dot-only mode. Actual runtime varies with brightness, reticle selection, motion, temperature, and battery condition.

Mounting and Adjustment

The Compact model uses the Shield RMSc footprint. SIG includes M3 and M4 Torx mounting screws for the Compact sight, along with T5 and T10 Torx tools. Slide cuts, screw lengths, and adapter requirements can differ among pistol manufacturers and models, so compatibility should be confirmed with the firearm or slide maker before installation. Use the specified hardware and torque guidance for the exact host firearm and optic.

Windage is adjusted from the left side of the optic, while elevation is adjusted from the top of the rear deck. According to SIG’s operator manual, one-quarter turn of either adjustment screw provides approximately 10 MOA of movement, and a full turn provides approximately 40 MOA. After mounting, the sight should be zeroed with the intended pistol and ammunition and checked again after initial use.

Key Features

• Model: ROMEO-RS Compact open reflex sight
• Reticle: selectable 2 MOA red dot, 32 MOA circle, or combined circle-dot
• Magnification: 1x
• Footprint: Shield RMSc
• Clear aperture: 24mm
• Brightness settings: eight
• Power: one side-access CR1632 battery
• Motion activation: SIG MOTAC
• Construction: skeletonized steel chassis molded into a high-strength polymer housing
• Overall dimensions: approximately 1.61 x 1.12 x 1.10 inches
• Weight: approximately 0.75 ounce with battery
• Color: black

Product Identification

• Manufacturer: SIG SAUER
• Manufacturer part number: SOR02100
• UPC: 798681703371
• Included hardware: Compact-model M3 and M4 mounting screws, T5 and T10 Torx tools, and CR1632 battery