First Look: SIG Sauer Romeo 4XT Optic

A military-grade optic for the armed citizen.

posted on December 12, 2022
SIG Romeo 4X Sight

SIG Sauer Optics Division is releasing a new upgraded version of its 1x20mm Romeo 4T electronic red dot sight to its lineup of modern electronic non-magnified optics. The new Romeo 4XT Pro Mil Spec red dot follows the original SIG Sauer Romeo 4T dot while making use of newly added key features requested by and with feedback from professional users.

Compared to the previous model, the Romeo 4T, the illumination controls on the new Romeo 4XT optic have migrated to the top of the unit in order to make them easier to reach with either hand and prevent the controls from bumping into chest rigs, plate carriers or any other load bearing equipment the corners of the optic might encounter while being mounted and slung from a carbine. The SIG Sauer Romeo 4XT is available with four different red reticle options which include the traditional 2-MOA dot, a red dot enclosed in a circle reticle, a ballistic drop compensating dot reticle and another enclosed circle reticle with ballistic drop compensating dots. These units ship from the factory with a lens caps and a kill flash grid. Available finishes are either black or flat dark earth finish. The optic has a runtime of 50,000 hours and is powered by a single, commonly available AAA alkaline battery.

SIG Sauer Romeo 4XT Pro Mil Spec Specifications:

  • Magnification: 1x
  • Objective Lens: 20 mm
  • Weight: 7 ounces
  • Battery: 1 AAA
  • Runtime: 50,000 hours
  • Waterproof, fog and dust rating: IPX8
  • Daytime Settings: 9
  • Night Vision Settings: 3
  • Tested To MIL-STD-810 Standards
  • All four different reticle choices feature a central 2-MOA dot

Retail pricing for the new Romeo 4XT Pro Mil Spec electronic rail-mounted red dot sights starts at $640. For more information and to see a more comprehensive list of specifications and details, please visit SIG Sauer’s website at


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