Sig Sauer ROMEO-X SIG-LOC Pro Enclosed Reflex Sight 6 MOA

The Sig Sauer ROMEO-X SIG-LOC Pro Enclosed Reflex Sight, 6 MOA (Sig part no. SORX1590) is a pistol-mounted red dot built by Sig Sauer using the SIG-LOC mounting system first developed for the ROMEO-M17, which creates five points of contact between slide and optic to eliminate shift in zero from recoil and hard impacts. A fully enclosed, sealed 7075 aluminum housing with distortion-free aspherical glass protects the optical system, while a bottom-mounted design extends focal length to reduce parallax and reticle distortion. The larger 6 MOA green dot offers faster acquisition than a finer dot, and the sight is assembled in the USA and backed by Sig Sauer’s Infinite Guarantee.

Key Specifications

• Reticle: 6 MOA green dot.
• Magnification: 1x.
• Mounting footprint: SIG-LOC Pro.
• Housing: fully enclosed 7075 aluminum, sealed optical system.
• Battery life: up to 20,000 hours, single CR2032.
• Illumination settings: 15, including 3 night-vision-compatible levels.
• Overall length: 1.90 inches.
• Waterproofing: IPX-8.
• Color: black.

Frequently Asked Questions

What’s the difference between this 6 MOA model and the 3 MOA version?
Both share the same SIG-LOC Pro enclosed housing; this model uses a larger 6 MOA green dot for faster target acquisition, while the 3 MOA version offers a finer aiming point for more precise shots.

Is this sight still compatible with iron sights?
Yes, pistol slides cut for SIG-LOC mounting are still fully compatible with standard-height iron sights for co-witness.

How long does the battery last?
Sig Sauer rates this sight for up to 20,000 hours on a single CR2032 battery.

Buy the Sig Sauer ROMEO-X SIG-LOC Pro Enclosed Reflex Sight 6 MOA

This Sig Sauer red dot, part of our Red Dots Sights lineup, ships fast from our Lubbock, Texas gun shop — order online today.