SIG Sauer ROMEO-MSR Red Dot Sight - 2 MOA

Manufactured by Sig Sauer
SKU: SOR72001
MPN: SOR72001
Manufactured by Sig Sauer
80 Reviews

Out of Stock

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The SIG Sauer Romeo-MSR Red Dot Sight is highly versatile and compatible with a wide variety of firearms including the MSR, carbines, shotguns, and even air rifles. It is a fully sealed design made from aluminum making this an extremely durable option for any use case. The protected emitter projects a 2 MOA red dot for quick and precise shooting. The top mounted rotary dial allows you to quickly switch between 10 different brightness settings and 2 night vision settings. The battery compartment is also located in the rotary knob for easy access and runs for about 20,000 hours on a CR1632 battery. The lenses are fully coated for optimal light transmission and clarity and like most red dots has unlimited eye relief and zero parallax. Additionally, it comes with see through flip up lens covers for added protection during storage. Another bonus of this red dot optic is that it comes with a skeletonized lightweight riser mount set for an absolute co-witness with iron sights.

  • 2 MOA red dot sight
  • Aluminum housing
  • High performance coated lenses
  • Unlimited eye relief
  • Zero parallax
  • Top mounted rotary knob
  • 10 brightness settings
  • 2 night vision
  • Top mounted battery compartment – CR1632
  • 20,000 hours of runtime
  • IPX-7 waterproof and fog proof
  • Includes lightweight absolute co-witness mount
  • Includes see through lens covers

Sig Sauer is a world-renowned firearms manufacturer with a rich history of innovation and design leadership. No other firearms manufacturer is so highly regarded and so universally respected for the quality, reliability, and safety of its products. Since 1864 they have expanded their product line to include suppressors, optics, ammo, and airguns to provide customers with a greater range of firearms and equipment.
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Battery Life10,001 - 25,000 Hours
Battery TypeCR1632 3V Lithium Coin
BrandSig Sauer
Brightness10 Settings
Click Value1/2 MOA
FinishHardcoat Anodized
Mount CompatibilityAimpoint Micro
Night Vision CompatibleNight Vision Compatible
Reticle2 MOA Dot
Reticle ColorRed
Warranty5 Year Factory Warranty
Weight4.9 oz.
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

80 reviews


Highly recommended.

by -

This thing is bad ass! Love it more than the Romeo 5! Sturdy, nice looking, and easy...a great price too. Mine’s been taking a beating and the finish holds up extremely well.

Bad Tool/Good Sight

by -

The red dot itself seems to function well. I was able to dial in the red dot to co-witness with the iron sights easily. Unfortunately, the tool that comes with the red dot bent and stripped when hand tightening the mount to the rail. This also damaged the head of the screw. It is very disappointing that they have used such poor quality metal for the tool that it literally deformed when being used with only the force of my fingers.

Two thumbs up!!


Great for the price, loved it.

Good Red Dot Sight

by -

I bought this red dot solely to put on an extra rifle that needed an optic. I decided to take a chance on the SIG Romeo MSR and I have to say that I’m impressed. The build construction on the body is solid and does not feel cheap. The brightness knob works as advertised and the zeroing process is fine with the exposed turrets. The dot looks crisp to my my eye and the glass is decently clear.

The one thing I absolutely hate about this optic package is the mount it comes with. The optic mount is so insanely cheap quality compared to the actual red dot itself. I immediately replaced with a Midwest Industries lower 1/3rd mount and it works perfectly.

I haven’t been too rough with this red dot yet unlike most of my other optics but I honestly think it can take a good amount of abuse. I’m satisfied with this purchase.

Great optic

by -

Simple sweet and stupid. Simple set up, nice looking and anyone stupid can use it. Nothing crazy complicated and accurate.

Nice, simple, holds a zero

by -

I put this (my 3rd) on a new 9mm AR-platform and bore sighted it. First two groups of three were for zero, from then on I was in the 10-ring with every one of the next 30 rounds. Zero held, sight held up great.

Excellent RDS


I bought one for a PDW Pistol build. This sight is excellent for the money and the 2 MOA dot is crisp and clean. The mount is sturdy and I really dig the see through flip up caps. Protects the main glass while still allowing you to shoot. This is an "absolute" co-witness mount. I'm not sure if they offer a lower 1/3 or not but for now, it will do the trick. Will likely buy another one or two!

its ok/works

by -

RomeoMSR shortcomings-- 1) The sight body is bulky in comparison to the ocular lens which obscures more of the field of view around the target. 2) The lens covers are always in the way and obscure too much of the field of view when opened. I found them annoying, so I completely removed them. 3) The windage/elevation turrets are exposed. 4) The battery is an odd size. All of my other optics share the same battery type, except for this one. 5) The on/off/adjustment control is ridiculously difficult to grip and turn, and the knurled edge is sharp. This makes turning on/adjusting brightness in a hurry difficult.

The clarity of the lenses, crispness of the dot, and field of view through the optic are good. Its reliability (dot works when you need it) and repeatability (holds zero) make it stand out in the budget red dot market.

I also own a Romeo5. When comparing the 2, the Romeo5 is less bulky and has superior controls, but you will pay more for those features.

nice unit


caught it on sale, should have snagged two!

nice unit


got it on sale 119.00, month and a half ago. installs easy, zeroed quick. lens caps are a bit of a hassle to put on, so they will stay on, problem solved. lower settings hard to see, in bright sun ,5-6 works fine.