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Questions & Answers
What footprint does it have? Expert Answer

The SIG SAUER Romeo-X 1x24mm Reflex Red Dot Sight uses the Shield RMSc footprint and will be a direct fit option for micro pistols such as the Sig P365.

by Ethan, Gear Expert, October 17, 2024
What is the RX footprint for this model? Is it for the P365 or P320?

The RX footprint refers to the original Romeo 1 compatibility. This optic has the Shield RMSc footprint that direct mounts to the P365. You would need an adapter plate to mount this to a P320 unless the P320’s slide is already cut for the Shield RMSc footprint.

by Bernard Bullock, Verified Owner, January 8, 2025
Customer Reviews
Helpful Positive Review
Romeo X red dot sight by Dutch Al, Verified Owner, July 13, 2025
Purchased this sight for my SIG P365XL. This red dot fits the RMSc footprint in the P365XL. A GREAT FIT! The Romeo X has an integral rear sight built. The rear sight is a perfect height match for the SIG front sight. Gives a dead on zero at 10 Y...
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1/1 found this helpful
Most Recent Reviews
Sig Romeo X Red Dot by Vhuerta64, Verified Owner, October 17, 2025
Great purchase perfect fits on my sig 365x. The sight is excellent to see hit your targets. Easy to adjust the elevation and windage .
Most Recent Reviews
Always a winner!! by Greg Corson, Verified Owner, October 17, 2025
This is my 5th purchase of this optic. It is fantastic. Easy to zero and have had no issues with keeping zero. Sits low enough to get co witness on every gun have put them on. Glass does have blue tint which is a little much, but when shooting you re...
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Most Recent Reviews
Worth the money by Dame, Verified Owner, June 4, 2025
I have a couple of this. I like matching up Sig optics with their guns. The low deck height and cutout in the back allows co-witnessing with the fixed sights. The optic has its own sights on the back in cse you have a slide that doesn't have rear sig...
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Most Recent Reviews
Sig Romeo X by Johnny H., Verified Owner, April 24, 2025
Crisp dot. Well made. External battery is nice. Looks good on gun.
Most Recent Reviews
Great red dot by Honest Abe, Verified Owner, April 12, 2025
Not cheap and it shows! Great product and easy to operate! Added to my Sig Fuse and she sure does look and work good!
Read All 9 Reviews
Color:
Black
Reticle:
3 MOA Red Dot
Illumination Color:
Red
Condition:
New
Red Dot Sights-Footprint:
Not Applicable

Code: SD9-RD-SORX1231-SORX1231

MPN: SORX1231

UPC: 798681699742

List: $369.99Save 14%
$319.99

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OP Bucks$14.40

Product Info for SIG SAUER SORX1231 Romeo-X 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

WARNING: California`s Proposition 65

Specifications for SIG SAUER SORX1231 Romeo-X 1x24mm Reflex Red Dot Sight:

Manufacturer: SIG SAUER
Color: Black
Fabric/Material: 7075 Aluminum
Magnification: 1 x
Objective Lens Diameter: 24 mm
Objective Window Size: 24 mm
Reticle: 3 MOA Red Dot
Illumination Type: LED
Illumination Color: Red
Brightness Settings: 15
Adjustment Click Value: 1.5 MOA
Emitter Type: Open
Battery Type: CR1632, Lithium Metal
Battery Quantity: 1
Battery Life: 20000 hours
Water Resistance Level: IPX-7
Length: 1.62 in
Width: 1.22 in
Height: 0.94 in
Weight: 1 oz
Condition: New
Red Dot Sights-Footprint: Not Applicable
Adjustability: Adjustable

Features of SIG SAUER SORX1231 Romeo-X 1x24mm Reflex Red Dot Sight

  • Patent-Pending Beryllium Copper Flexure Arm
  • Distortion Free Aspherical Lens
  • Open Emitter
  • MOTAC (Motion Activated Illumination)
  • Circle Dot With Individually Selectable 2 MOA Dot & 32 MOA Circle
  • Low Deck Height for Standard-Height Iron Sight Co-Witness
  • 15 Illumination Settings Including 3 Night Vision

Package Contents:

  • SIG SAUER SORX1231 Romeo-X 1x24mm Reflex Red Dot Sight

SIG SAUER SORX1231 Romeo-X 1x24mm Reflex Red Dot Sight Orderable Models

List of Orderable Models

  • SIG SAUER SORX1231 Romeo-X Reflex Red Dot Sight, 1x24mm, 3 MOA Red Dot, Black, SORX1231 , MPN: SORX1231 , UPC: 798681699742 , Code: SD9-RD-SORX1231-SORX1231

SIG SAUER SORX1231 Romeo-X 1x24mm Reflex Red Dot Sight Unavailable & Discontinued Models

List of Unorderable Models

  • USED, SIG SAUER SORX1231 Romeo-X Reflex Red Dot Sight, 1x24mm, 3 MOA Red Dot, Black, SORX1231 , MPN: SORX1231-EDEMO , Code: SD9-RD-SORX1231-SORX1231-EDEMO-RE-C
  • USED, SIG SAUER SORX1231 Romeo-X Reflex Red Dot Sight, 1x24mm, 3 MOA Red Dot, Black, SORX1231 , MPN: SORX1231-EDEMO , Code: SD9-RD-SORX1231-SORX1231-EDEMO-RE-B
  • DEMO, SIG SAUER SORX1231 Romeo-X Reflex Red Dot Sight, 1x24mm, 3 MOA Red Dot, Black, SORX1231 , MPN: SORX1231-DEMO , Code: SD9-RD-SORX1231-SORX1231-DEMO
  • USED, SIG SAUER SORX1231 Romeo-X Reflex Red Dot Sight, 1x24mm, 3 MOA Red Dot, Black, SORX1231 , MPN: SORX1231-EDEMO , Code: SD9-RD-SORX1231-SORX1231-EDEMO-RE-A
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