SIG Sauer Romeo3 Max


The SIG Sauer® Romeo3 Max is a compact, open reflex sight featuring a large 30mm wide, round lens design for superior field-of-view. Well suited for competition, it is a popular optic for use with the SIG P320 platform.

Available in 3 MOA and 6 MOA versions.

Looking for a custom slide with your optic? Order a Grayguns Custom Slide for your P320 and we'll professionally install the optic for free!
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The SIG Sauer Romeo3 Max was developed in collaboration with Team SIG Captain Max Michel. The red dot sight is a compact, open reflex sight featuring a 30mm wide, round lens. The sight is design for superior field-of-view, a special red-notch filter for a vivid red dot, and unrivaled optical clarity.

Available with a 3 or 6 MOA dot size for rapid target engagement, 12 illumination intensity levels, Motion Activated Illumination System (MOTAC™) activation, and up to 20,000 hours of runtime.

The Romeo3 Max is compatible with the following configurations and footprints:

  • Romeo3 Max
  • C-more RTS/STS footprint
  • Includes a low-profile M1913 Picatinny mount

We suggest you review the Romeo3 Max Operators Manual for additional information.

Romeo3 Max Features

  • High transmittance red notch reflector for excellent brightness, light transmittance, and zero distortion
  • 3 MOA and 6 MOA Dot with multiple intensity settings for rapid target engagement. Excellent under a full range of lighting conditions.
  • MOTAC powers up when it senses motion and powers down when it does not
  • The readily available CR2032 battery is side-loading, allowing for quick battery replacement without having to remove the sight from the firearm
  • The Romeo3 Max comes with a low-profile M1913 Picatinny mount. An absolute co-witness riser mount is also available as an accessory
  • Aircraft-grade CNC Aluminum housing ensures a lifetime of reliable service
  • Dependable waterproof (IPX-7 rated for complete water immersion up to 1 meter) and fog-proof performance
  • SIG Sauer Electro-Optics Infinite Guarantee™ and SIG Sauer Electronic Component Limited 5-Year Warranty.

* Grayguns and SIG can not guarantee compatibility with your pistol. New pistols may be released with the footprints listed. However, design differences – including the amount of thread engagement – may make the sight incompatible with your pistol.

  • Romeo3Max 3MOA, MPN SOR31003, UPC 798681597802
  • Romeo3Max 6MOA, MPN SOR32003, UPC 798681605699

Additional information

Weight 1 lbs
Package Dimensions 7 × 5 × 3 in
Dot Size

3 MOA, 6 MOA

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Many parts sold by Grayguns - including but not limited to triggers, trigger kits, internal components and spring kits - are intended for installation by a qualified armorer or gunsmith who is familiar with the firearm.

Although kits fit with no issues in a great majority of pistols, Grayguns cannot guarantee perfect functionality in every instance.

Due to varying tolerances present in all mass-produced firearms, professional fitting by a qualified armorer who is familiar with the pistol's action may be required.

Grayguns offers installation services for all parts kits we offer. If you have any issues or questions about the installation process, STOP IMMEDIATELY and contact the Grayguns Customer Service Team.