Romeo-X Reflex Sight, Enclosed, Sig-Loc Compact Footprint, 6 Moa Red Dot, Black

The Sig Sauer Romeo-X reflex sight with Sig-Loc compact footprint brings mil-spec engineering to your concealed carry or duty pistol. This enclosed red dot sight is purpose-built for shooters who demand rock-solid performance from their optic, with a 6 MOA red dot that cuts through clutter and locks onto target fast. The Sig-Loc mounting system establishes five contact points between optic and slide—a design inspired by Sig's legendary ROMEO-M17—to create the kind of zero retention you need after thousands of rounds downrange.

The Romeo-X features a longer focal length than traditional pistol optics, which means less parallax and reticle distortion—in plain English, a clearer, crisper dot and a more forgiving shooting experience, especially at close range where most defensive and hunting pistol work happens. Its rugged 7075 aluminum housing and fully sealed optical system are built to handle the abuse that comes with carry and duty use. The aspherical glass lens delivers distortion-free glass, and the enclosed design protects the optic from the elements and impacts without sacrificing light transmission. At industry-leading low deck height, it co-witnesses with standard-height iron sights, so you're never caught without a backup aiming solution.

Battery life won't be a worry: the side-load battery design gives you up to 20,000 hours of runtime. MOTAC (Motion Activated Illumination) powers down the dot when the gun sits still, preserving battery and keeping you in stealth mode. Fifteen illumination settings include three dedicated night vision modes. Assembled in the USA and backed by Sig's Infinite Guarantee, the Romeo-X delivers the kind of reliability that professionals and serious civilians depend on.

Key Features

• Sig-Loc mounting footprint with five contact points for maximum zero retention and recoil stability
• 6 MOA red dot reticle for quick target acquisition and rapid follow-up shots
• Longer focal length reduces parallax and reticle distortion for a crisp, clear sight picture
• Enclosed, fully sealed optical system protects against weather and impact
• Distortion-free aspherical glass lens
• Low deck height allows co-witness with standard iron sights
• MOTAC (Motion Activated Illumination) conserves battery in standby
• 15 illumination settings plus three night vision modes
• 20,000 hour battery life with side-load battery access
• Rugged 7075 aluminum housing
• Assembled in USA; backed by Infinite Guarantee

Specifications

Frequently Asked Questions

What pistols is the Romeo-X with Sig-Loc footprint compatible with?

Currently, the P365-FUSE is the only slide compatible with the Sig-Loc mounting footprint. Sig has announced future integration across the P365 and P320 platforms.

Can I use this red dot sight with my existing iron sights?

Yes. The Romeo-X features an industry-leading low deck height and co-witnesses with standard-height iron sights, so you can use your irons as a backup if needed.

How long does the battery last?

The Romeo-X delivers up to 20,000 hours of battery life. The side-load battery design makes replacement quick and easy, and MOTAC (Motion Activated Illumination) shuts down the dot when the gun is stationary, further extending runtime between changes.

What makes the Sig-Loc mounting system different?

Sig-Loc establishes five points of contact between the optic and slide, creating the strongest lockup in its class and eliminating zero shift caused by recoil and impact. The design was inspired by Sig's mil-spec ROMEO-M17 and is engineered to handle the demands of professional and civilian use.