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Sig Sauer ROMEO1PRO 3 MOA 1.0 MOA Adjust Steel Shroud Reflex Sight SOR1P100

SKU SOR1P100-Sig

List Price $349.99
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The Sig Sauer ROMEO1PRO Reflex Sight is a no nonsense compact and combat-ready red dot sight designed for use with handguns. The ROMEO1PRO features Sig's MOTAC (Motion Activated Illumination System) that activates red dot illumination when motion is detected and deactivates dot illumination when motion ceases - allowing for up to 20,000 hours of runtime per battery. With an upgraded emitter for superior brightness, the ROMEO1PRO is capable of mounting to any SIG pistol or any other pistol machined to accept the ROMEO2 / PRO reflex sight interface and mounting hole spacing using the included M4 mounting screws. The ROMEO1PRO features Sig's TruHold Lockless Zeroing System that utilizes twin adjustment springs and ensures return to zero shot after shot.

Features of the Sig Sauer ROMEO1PRO Reflex Sight

  • Molded Glass Aspheric Lens
  • High Performance Lens Coatings
  • Multiple Brightness Settings
  • TruHold Lockless Zeroing System
  • MOTAC (Motion Activated Illumination System)
  • CNC Machined Aluminum Housing
  • Rugged Protective Steel Shroud Included


  • Magnification Range:1x
  • Reticle Details3 MOA Red Dot
    Adjustments: 1 MOA
    Overall Elevation/Windage Adjustment: 100 MOA
  • Objective Lens Diameter:30mm
    Window Height: 0.71" / 18mm
    Window Length: 1.1" / 28mm
  • Dimensions:Overall Length: 1.8"
    Front Width: 1.2"
    Rear Width: 1.0"
    Overall Height: 1.1"
  • Weight:1.0 oz
  • BatteryCR1632
  • Battery TypeCR1632
  • Night Vision CompatibleYes
  • Brightness Settings2 NVD 10 Regular
  • Product TypeReflex Sight/Red Dot
  • Item ConditionNew
  • UPC798681616534
  • MPNSOR1P100

Customer Reviews

Average Rating
March 9, 2024

As always, EuroOptic provided excellent service and shipped quickly. The sight was obviously a perfect match for a pro-cut slide for my custom built Sig P226 and has functioned flawlessly so far. Quick to zero in, easy to acquire sight and kept zero through about 250-300 rounds so far.

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November 28, 2023

Received it fast, it was easy to install, and it works great. I was amazed at how much easier it was to hit 25 yard head shots on a paper target. Red dots do make a huge difference at longer ranges.

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November 3, 2023

First time buyer from Euro Optic and was a little nervous about because of the extra low price I found on a Sig Romeo1 Pro. After reading some reviews and ordering from them I couldn't be happier. Great product crazy low price and fast shipping. What more could I ask for?

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June 14, 2023

I am really surprised how much I like the SIG Sauer Romeo1 Pro. The dot is very clear and crisp to my eyes, and they look amazing on my SIG Sauer pistols. The windows are wide , yet they are low profile. I really like how snugly they fit into the Sig optic cuts, even before the screws are placed. An excellent gun/optical sight system. EuroOptic got it to me very quickly, packaged very well and in perfect condition. That has been my experience every time I have ordered from them. Excellent price too !

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May 17, 2023

Shipping from EuroOptic was good, no complaints. This is my 2nd Romeo1pro. I mounted this unit on my p320 pro cut slide with no issues.

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February 20, 2022

I received the Sig red dot quickly from Eurooptic just like all other purchases I have made from them. I mounted it on a P320 X5 legion in less than 15 minutes. The fit was perfect since no adapter plate was required. Shot it at the range to get it zeroed in. Put an additional 200 rounds through it with excellent groups. Great sight at a great price.

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January 10, 2022

Haven't used it much but what I have ,I like it

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August 23, 2021

Arrived quickly and fully functional, as expected. It’s currently mounted on my duty weapon, and I’m impressed by its initial quality. EuroOptic had the best price on the market for this product, and they’ve definitely made a loyal customer out of me with their business practices.

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May 8, 2021

As a Sig product, expected quality - was better than expected! Clean and clear glass, with a great field of view, controls easy to use, plus very easy and quick to install on my Sig 320 Legion. Shot 200 rounds, at 25 yrds, didn’t lose zero nor any fluctuations/loss of dot size/strength. Made it look like I really know how to shoot (somewhat) accurately! Was lucky that EuroOptic had it available and at a great price (can’t be said of other on-line sites) like all other items I’ve gotten from EuroOptic!

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January 10, 2022


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