ROMEO-X SIG-LOC™ PRO Red Dot Sight, 3 MOA – SIG Sauer

The SIG Sauer ROMEO-X SIG-LOC™ PRO is a low-profile pistol red dot sight designed for shooters who demand secure mounting, a clear sight picture, and fast target acquisition. Built around the proprietary SIG-LOC mounting system, it offers exceptional stability under recoil while remaining compatible with co-witness iron sights.

SIG-LOC mounting system

The foundation of the ROMEO-X design is the SIG-LOC mounting interface, which creates multiple contact points between the optic and the slide. This system minimizes movement under recoil and helps maintain zero even during intensive use. The optic remains firmly seated, contributing to consistent performance and reliable shot placement.

Low-profile design and co-witness capability

The ROMEO-X SIG-LOC PRO features a very low mounting height, allowing continued use of standard-height iron sights as a backup. Transitions between the red dot and mechanical sights remain natural and intuitive, without the need for slide modifications or suppressor-height sights.

Optical clarity and aiming performance

An aspherical lens provides a clear and distortion-free sight picture across the viewing window. The 3 MOA aiming dot remains crisp and well defined, supporting both rapid target acquisition and precise shot placement. The optical design offers generous tolerance during dynamic shooting and rapid target transitions.

Illumination and controls

Motion-activated illumination powers the optic on when movement is detected and conserves battery life when inactive. Brightness is adjusted via easily accessible controls, with settings compatible with night vision devices. The battery compartment is accessed from the side, allowing replacement without removing the optic from the slide.

Construction and durability

The housing is CNC-machined from high-strength aluminum to withstand recoil, impacts, and harsh handling. The closed emitter design protects internal components from debris and environmental exposure, supporting long-term reliability without adding unnecessary bulk.

Design origin and compatibility

The ROMEO-X SIG-LOC PRO is designed, tested, and assembled in the USA. It is intended for optics-ready pistols equipped with the appropriate mounting interface and reflects SIG Sauer’s experience in developing optics for professional and service use.

Key features:

• SIG-LOC mounting system for secure, multi-point attachment
• low-profile design with iron sight co-witness capability
• aspherical lens for a clear, distortion-free sight picture
• crisp 3 MOA red dot
• motion-activated illumination
• night vision compatible brightness settings
• side-loading battery compartment
• CNC-machined aluminum housing
• designed and assembled in the USA