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Questions & Answers
Which optics would work best for my P320. I was going to purchase the M 17 but after reading it will not fit. So if someone could please advise! Expert Answer

The P320 comes from the factory with a Deltapoint Pro optic cut. This means you will be able to direct fit optics with the Deltapoint Pro, RMR, and K footprints. Direct fit options include the Sig Romeo 1 Pro, Leupold Deltapoint Pro, Vortex Defender ST and XL, Holosun EPS, Shield RMS and more.

by Ethan, Gear Expert, January 24, 2025
Will this optic fit a commercial M18 SIG pistol? Expert Answer

The IG SAUER Romeo M17 1x24mm Red Dot Sight only fits M17/M18 military issue, and commemorative pistols with a single optics plate mounting screw. This sight will not fit any other pistols.

by Ethan, Gear Expert, May 15, 2024
Customer Reviews
Helpful Positive Review Out-freakin-standing! by DirtDiver75, May 23, 2023
This baby rocks! I never found a red dot that could handle my abuse... and was never a big fan of them anyway, but even an old grunt breaks down once in a while. Well, I stand corrected. The DOD finally did something right, ditched that clunky ole M9...
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16/26 found this helpful
Most Recent Reviews Great Optic by Paul, Verified Owner, April 23, 2025
Amazing optic sold out nearly everywhere but here. Shipping took a hot minute but at least I got my sight.
Most Recent Reviews rock solid by Frank Monr, Verified Owner, March 9, 2025
This puppy is clear crispy and tough. Mounts snug and hold zero im 1500 rounds in and she just performs.
Read All 3 Reviews

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Product Info for SIG SAUER Romeo M17 1x24mm Reflex Red Dot Sights

The M17 and M18 pistols have been selected by the US Military as the official sidearm, and the ROMEO-M17 is the only optic that is truly designed specifically for this pistol. All other optics have many disadvantages and make several compromises. The ROMEO-M17 does not. image

The ROMEO-M17 pistol red dot sight utilizes Sig Sauer's proprietary sig-loc mounting interface and only fits Sig Sauer M17/M18 military issue, surplus and commemorative pistols with a single optics plate mounting screw. This sight will not fit any other pistols. Many of the innovative features found on the ROMEO-M17 will be available on new romeo pistol red dot sights as they are launched in the near future.

Specifications for SIG SAUER Romeo M17 1x24mm Reflex Red Dot Sights:

Manufacturer: SIG SAUER
Color: Coyote Tan
Finish: Cerakote
Fabric/Material: 7075 Aluminum
Magnification: 1 x
Objective Lens Diameter: 24 mm
Reticle: 2 MOA
Brightness Settings: 15
Adjustment Type: MOA
Adjustment Click Value: 1.5 MOA
Emitter Type: Enclosed
Lens Material: Glass
Battery Type: CR2032
Battery Quantity: 1
Gun Make: SIG Sauer
Gun Model: SIG Sauer M18, SIG Sauer M17
Length: 2.4 in
Width: 0.9 in
Height: 1.1 in
Weight: 1.5 oz
Quantity: 1
Red Dot Sights-Footprint: SIG-LOC

Features of SIG SAUER Romeo M17 1x24mm Reflex Red Dot Sights

  • A fully enclosed, sealed and purged optical system, for ultimate protection from the elements
  • Mounts from underneath the pistol slide, re-using the MHS pistol rear sight block and sight block screw
  • Integrated gas deflector on the front of the housing
  • Machined anti-reflection grooves on all rear surfaces for reduced glare
  • Extremely low deck height, allowing a full sight picture and co-witness with standard-height sights
  • SIG-LOC (SIG Leverage Optimizing Connection) proprietary mounting interface, for the ultimate optic/pistol lockup.
  • The reticles are independently selectable (circle only, dot only, or circle/dot combination).
  • Independent brightness adjustment buttons that are recessed within a protective plate which can be activated even with gloves on.
  • Buttons have bump features above UP and below DOWN, so they can be determined by feel.
  • 15 brightness settings, with 3 of the settings optimized for use with Gen 3+ NV devices
  • A side-mounted CR2032 battery compartment with a threaded battery cap, for easy battery changes without the need to remove the optic from the firearm.
  • The cap is slotted and knurled, for use with or without tools.
  • Minimum continuous runtime of 20,000 hours, at medium brightness setting
  • 2 drainage holes machined in the sides of the housing, just behind the rear sealed window, to allow pooled liquid to escape when the optic goes from a vertical position (such as in a holster) to a horizontal position (such as shooting)
  • Windage and elevation adjustments have tactile clicks.
  • Adjustment screws are slotted, for use with any small flat-blade tool.
  • *Please Note - The ROMEO-M17 pistol red dot sight utilizes SIG SAUER'S proprietary SIG-LOC mounting interface and only fits SIG SAUER M17/M18 military issue, and commemorative pistols with a single optics plate mounting screw. This sight will not fit any other pistols.

Package Contents:

  • SIG SAUER Romeo M17 1x24mm Reflex Red Dot Sights

SIG SAUER Romeo M17 1x24mm Reflex Red Dot Sights Orderable Models

List of Orderable Models

DEMO, SIG SAUER Romeo M17 1x24mm Reflex Red Dot Sights, 2 MOA Red Dot Reticle, Coyote Tan, SORM1700 , MPN: SORM1700-DEMO , Code: SD9-RD-RM17-SORM1700-DEMO
SIG SAUER Romeo M17 1x24mm Reflex Red Dot Sights, 2 MOA Red Dot Reticle, Coyote Tan, SORM1700 , MPN: SORM1700 , UPC: 798681688555 , Code: SD9-RD-RM17-SORM1700

SIG SAUER Romeo M17 1x24mm Reflex Red Dot Sights Unavailable & Discontinued Models

List of Unorderable Models

USED, SIG SAUER Romeo M17 1x24mm Reflex Red Dot Sights, 2 MOA Red Dot Reticle, Coyote Tan, SORM1700 , MPN: SORM1700-EDEMO , Code: SD9-RD-RM17-SORM1700-EDEMO-SC-C
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