The Sig Sauer ROMEO-X SIG-LOC Pro Enclosed Reflex Sight, 3 MOA (Sig part no. SORX1580) is a pistol-mounted red dot built by Sig Sauer around the SIG-LOC mounting footprint, which uses five points of contact between slide and optic to hold zero through heavy recoil and hard impacts. Its fully enclosed CNC 7075 aluminum housing and argon-purged optical system keep dirt and moisture out, while a bottom-mounted design extends focal length to cut parallax and reticle distortion. The 3 MOA green dot gives a precise aiming point for fast, accurate shooting, and the sight is assembled in the USA and backed by Sig Sauer’s Infinite Guarantee.

Key Specifications

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

Frequently Asked Questions

What does the SIG-LOC footprint offer over a standard top-mount red dot?
SIG-LOC establishes five points of contact between the slide and optic, reducing shift in zero from recoil and impacts, while slides cut for SIG-LOC still accept traditional top-mount reflex sights.

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

Is this sight enclosed or open?
It’s a fully enclosed reflex sight, so the emitter is sealed against dirt, moisture, and debris.

Buy the Sig Sauer ROMEO-X SIG-LOC Pro Enclosed Reflex Sight 3 MOA

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