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Questions & Answers
Does this fit the Sig Sauer-P-365 XL

This is a sig loc mounting check your slide

by THINK, Verified Owner, February 22, 2026
Will this fit on P 211 gto

Yes, it has the same Sig Loc Pro footprint required for that pistol. You can verify using Sig’s website under optic cut guide

by Kevin Lanham, Verified Owner, September 14, 2025

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Product Info for Sig Sauer Romeo-X SIG-LOC Compact 1x24mm Reflex Red Dot Sight

Introducing the new ROMEO-X optics family. Built from the ground up with industry-leading functionality. The ROMEO-X is the result of our experience developing durable red-dot technology that's trusted by the military and put into a streamlined civilian package, inspired by the MIL-SPEC ROMEO-M17. Featuring a CNC 7075 aluminum housing, intuitive adjustment buttons, a side-mounted battery compartment, and an ultra-low deck height that gives you the ability to co-witness with standard height iron sights. Designed, tested, and assembled in the USA, the ROMEO-X boasts direct mounting footprints for your favorite optics-ready pistols.image

The SIG-LOC (Leverage Optimized Connection) system was first concepted during the development of the ROMEO-M17, revolutionizing pistol-mounted optic integration with a low-profile, ultra-tough connection between the optic and pistol slide. Designed for precision and strength, SIG-LOC ushers in a new era of expectation and performance for civilians and professionals with the ROMEO-X SIG-LOC pistol-mounted red dot.

SIG-LOC is an innovative mounting footprint that establishes five points of contact between the slide and optic to eliminate shift in zero created by extensive shock from recoil and harsh impacts. The unique bottom-mounted design allows for a longer focal length that dramatically reduces parallax and reticle distortion to provide an incredibly forgiving shooting experience.

With SIG-LOC, you’re investing in technology that has been vetted and trusted by the most demanding users in the world, ensuring superior accuracy and reliability in every situation.

Specifications for Sig Sauer Romeo-X SIG-LOC Compact 1x24mm Reflex Red Dot Sight:

Manufacturer: SIG SAUER
Color: Black
Fabric/Material: 7075 Aluminum
Magnification: 1 x
Objective Lens Diameter: 24 mm
Illumination Type: LED
Illumination Color: Red
Brightness Settings: 15
Adjustment Click Value: 1.5 MOA
Emitter Type: Enclosed
Battery Type: Lithium Metal, CR1632
Battery Quantity: 1
Battery Life: 20000 hours
Water Resistance Level: IPX-7
Gun Make: SIG Sauer
Gun Model: SIG Sauer P365-FUSE, SIG Sauer P365
Length: 1.67 in
Width: 1.2 in
Height: 0.94 in
Weight: 1.24 oz
Red Dot Sights-Footprint: SIG-LOC
Lens Type: Glass
Gun Type: Pistol
Adjustability: Adjustable

Features of Sig Sauer Romeo-X SIG-LOC Compact 1x24mm Reflex Red Dot Sight:

  • Inspired by MIL-SPEC ROMEO-M17
  • Establishes 5 total points of contact to create the strongest lockup in the industry
  • Longer focal length to dramatically reduce parallax and create an ultra-crisp reticle
  • Rugged 7075 aluminum housing with a fully enclosed and sealed optical system
  • Distortion-free aspherical glass lens
  • MOTAC (Motion Activated Illumination)
  • Industry’s lowest deck height for standard-height iron sight co-witness
  • 20,000 hour battery life with side load battery
  • 15 illumination settings including 3 dedicated night vision

Package Contents:

  • Sig Sauer Romeo-X SIG-LOC Compact 1x24mm Reflex Red Dot Sight

Sig Sauer Romeo-X SIG-LOC Compact 1x24mm Reflex Red Dot Sight Orderable Models

List of Orderable Models

  • SIG SAUER Romeo-X SIG-LOC Compact 1x24mm Reflex Red Dot Sight, 6 MOA Red Dot, Black, SORX1660 , MPN: SORX1660 , UPC: 798681711635 , Code: SD9-RD-SORX1241-SORX1660
  • SIG SAUER Romeo-X SIG-LOC Compact 1x24mm Reflex Red Dot Sight, 3 MOA Red Dot, Black, SORX1630 , MPN: SORX1630 , UPC: 798681711628 , Code: SD9-RD-SORX1241-SORX1630
  • USED, SIG SAUER Romeo-X SIG-LOC Compact 1x24mm Reflex Red Dot Sight, 3 MOA Red Dot, Black, SORX1630 , MPN: SORX1630-EDEMO , Code: SD9-RD-SORX1241-SORX1630-EDEMO-OB-C
  • USED, SIG SAUER Romeo-X SIG-LOC Compact 1x24mm Reflex Red Dot Sight, Circle-Dot, Black, SORX1600 , MPN: SORX1600-EDEMO , Code: SD9-RD-SORX1241-SORX1600-EDEMO-RE-B
  • SIG SAUER Romeo-X SIG-LOC Compact 1x24mm Reflex Red Dot Sight, Circle-Dot, Black, SORX1600 , MPN: SORX1600 , UPC: 798681706457 , Code: SD9-RD-SORX1241-SORX1600

Sig Sauer Romeo-X SIG-LOC Compact 1x24mm Reflex Red Dot Sight Unavailable & Discontinued Models

List of Unorderable Models

  • USED, SIG SAUER Romeo-X SIG-LOC Compact 1x24mm Reflex Red Dot Sight, 6 MOA Red Dot, Black, SORX1660 , MPN: SORX1660-EDEMO , Code: SD9-RD-SORX1241-SORX1660-EDEMO-RE-C
  • DEMO, SIG SAUER Romeo-X SIG-LOC Compact 1x24mm Reflex Red Dot Sight, Circle-Dot, Black, SORX1600 , MPN: SORX1600-DEMO , Code: SD9-RD-SORX1241-SORX1600-DEMO
  • USED, SIG SAUER Romeo-X SIG-LOC Compact 1x24mm Reflex Red Dot Sight, Circle-Dot, Black, SORX1600 , MPN: SORX1600-EDEMO , Code: SD9-RD-SORX1241-SORX1600-EDEMO-US-C
  • DEMO, SIG SAUER Romeo-X SIG-LOC Compact 1x24mm Reflex Red Dot Sight, 6 MOA Red Dot, Black, SORX1660 , MPN: SORX1660-DEMO , Code: SD9-RD-SORX1241-SORX1660-DEMO
  • DEMO, SIG SAUER Romeo-X SIG-LOC Compact 1x24mm Reflex Red Dot Sight, 3 MOA Red Dot, Black, SORX1630 , MPN: SORX1630-DEMO , Code: SD9-RD-SORX1241-SORX1630-DEMO
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