SIG SAUER ROMEO5 GEN II 1x20mm Compact Durable IPX-7 Waterproof 2 MOA Rifle Shooting Dot Sight, Parallax-Free Optical Design, 12 Illumination Settings
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Availability:
In Stock.
Arrives
Thursday, Apr 30
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Style: Red Dot Sight - Black (SOR5101)
Features
- ROMEO5 GEN II - The ROMEO5 GEN II red dot sight represents the next step in the evolution of SIG SAUER's best-selling Electro-Optics series, now refreshed with a bold new design & enhanced functionality; This high-performance 1x aiming sight is designed to meet the rigorous demands of civilians and armed professionals alike
- NEXT-GEN PERFORMANCE - This compact red dot sight features ambidextrous top-mounted illumination controls, allowing users to easily adjust brightness levels for any situation; Featuring 10 daylight and 2 NV settings, this red dot sight ensures you have the perfect level of illumination for precise targeting in diverse environments
- UNMATCHED CLARITY - Engineered with a fully multi-coated lens that enhances light transmission, this red dot sight delivers clear sight pictures even in challenging lighting conditions; Thanks to the parallax-free optical design, the point of aim remains consistent regardless of eye position, providing unparalleled accuracy and confidence in every shot
- DURABLE CONSTRUCTION - Built to withstand harsh conditions, the optic's IPX7 rating offers dependable waterproof and fog-proof performance, ensuring reliability in any weather or situation; The rugged industrial design is further enhanced by a new I-BEAM mount that maximizes situational awareness, delivering a stable and secure platform for your red dot sight
- INCREASED BATTERY LIFE - The ROMEO5 GEN II shooting sight provides a 1x enclosed aiming solution for todays carbine platforms, with a crisp 2 MOA red dot emitter powered by a single battery that can be quickly replaced; Coupled with SIG SAUER'S motion-activated MOTAC technology, this dot sight boasts an industry-leading 40,000-hour runtime under normal use; MOTAC immediately powers up illumination when it senses motion and powers down when it does not in order to extend battery life
Brand: Sig Sauer
Color: Black
Style: Red Dot Sight - Black (SOR5101)
Sport: Hunting
Item Weight: 9.92 ounces
Material: Metal
Magnification Maximum: 1 x
Objective Lens Diameter: 20 Millimeters
Magnification Minimum: 1 x
Compatible Devices: Handgun
Brand: Sig Sauer
Color: Black
Style: Red Dot Sight - Black (SOR5101)
Sport: Hunting
Item Weight: 9.92 ounces
Material: Metal
Magnification Maximum: 1 x
Objective Lens Diameter: 20 Millimeters
Magnification Minimum: 1 x
Compatible Devices: Handgun
Mounting Type: Picatinny Mount
Night vision: Yes
Manufacturer: Sig Sauer
Reticle Type: dot
UPC: 798681694600
Global Trade Identification Number: 00
Item Package Dimensions L x W x H: 5.47 x 4.13 x 2.44 inches
Package Weight: 0.37 Kilograms
Item Dimensions LxWxH: 5.91 x 4.65 x 2.6 inches
Brand Name: Sig Sauer
Suggested Users: unisex
Number of Items: 1
Part Number: SOR5101
Included Components: SIG SAUER ROMEO5 Gen 2 1x20mm Reflex Red Dot Sight
Date First Available: August 1, 2024
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Apr 30
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: Red Dot Sight - Black (SOR5101)
Be forewarned, if you have an astigmatism in your dominant eye, you're gonna be reminded of it every time you look through a red dot optic. It's a little less intense if you use a magnifier but still present. My fault for having an imperfect eyeball. I'm far from an SIG SAUER fanboy. I have mixed feelings about Exeter, NH. I have more fixed feelings about Chinese manufacturing. I have even more mixed feelings about shady acquisitions of US Government contracts. I would not let a P320 into my household. However, I am thrilled to have this red dot on my mid-length rifle. Its direct Holosun competitor costs more and does less. The construction of this optic is more than solid enough for its cost range and application, the housing is well built and the finish is of a higher quality than anticipated. The dot itself is crisp, with more than enough adjustability for illumination. On higher illuminations you'll get a halo around the glass edge where it meets the housing. Not a big deal. It looks good! Especially for its form factor. The packaging was excellent, with ample documentation and supplementary installation components. Installation is easy and the optic secures firmly in place with a single torx bolt (torx wrench included). Comes with two different mounts. I've yet to lose zero or have I needed to re-tighten the mount aside from when I needed to move its location on the rail. The ROMEO 5 has absolute cowitness and the dot sits nicely in line with the fixed Front Sight post on my particular setup. The red-tinted lensing on the front glass looks cool. The quality of the glass is excellent for the price range. Clear and without any noticeable tint or distortion. Astigmatism aside, I have no issue accurately making A-zone 1-1.5 MOA groupings at 100m. Anything beyond that you'll likely need a magnifier if you're of diminished vision like myself. I currently have it paired with an off-brand 3x magnifier that an acquaintance gifted me. Works like a charm, however the magnifier I'm using is also of a compact form factor, and the eye relief leaves something to be desired (gas straight to the face). I imagine pairing the Romeo 5 with its SIG SAUER Juliet counterpart would yield more favorable results. Shake awake works well, for now. Haven't had to replace the battery yet. Battery life technology has improved such that the CR battery will last more than long enough for the needs of anyone who is in the demographic for this red dot. If you don't want to replace batteries, buy a TA31. The bikini type lens cover included with the ROMEO 5 doesn't quite fit snugly but I'm happy they included one at all. It will slip off if you even think about picking up your rifle. That's okay. It's a red dot, it works well for its intended purpose. What more do you need to know. I'd honestly recommend this RDS to anyone looking for one around this price point. At the very least you're supporting a US-based company with your purchase.
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Reviewed in the United States on February 20, 2026 by Dave Klymenko
Style: Red Dot Sight - Black (SOR5101)
The SIG Romeo5 Gen 2 is an excellent red dot for the price. It’s lightweight, durable, and holds zero without any issues. The dot is clear and easy to acquire. Simple setup, reliable performance, and perfect for range use or duty rifles. Hard to beat for the value.
Reviewed in the United States on February 7, 2026 by dxnpck
Style: Red Dot Sight - Black (SOR5101)
I mean how can you go wrong at this price point? And the best part is that it is damn reliable, and good quality too. The brightness range is great, lower settings perfect around dusk/dawn and the daytime brightness is good too.
Reviewed in the United States on December 14, 2025 by Alex of the Ozarks
Style: Red Dot Sight - Black (SOR5101)
I picked up the SIG ROMEO5 Gen 2 after using the original model for years—and I’m seriously impressed. SIG took a great optic and made it even better. The 2 MOA red dot is super crisp and easy to acquire, whether you’re at the range or out in bright sunlight. It has 10 brightness settings, including two for night vision, and the motion-activated MOTAC system is a game changer. The dot turns on instantly when you pick up your firearm and turns off when it’s idle—saving battery without any hassle. I’ve been running the same battery for months with no issues. Mounting was quick and easy, and I love that it comes with both a low mount and a co-witness riser. I’ve got mine on an AR-15, and it hasn’t lost zero after hundreds of rounds. Super rugged, water-resistant, and compact—perfect for a range of platforms. Bottom line: If you want a reliable red dot that punches well above its price point, the ROMEO5 Gen 2 is it. Ideal for beginners and seasoned shooters alike.
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Reviewed in the United States on May 5, 2025 by Ckfn
Style: Red Dot Sight - Black (SOR5101)
I have a 4T and wanted to see the difference between cheaper models. Pros: build quality feels just as good. The Romeo 5 feels good and robust in the hand. Having the Motac feature is also nice at this price point. Also, nice mounting options included. Looks a lot like a reptilia mount and it’s free. Cons: honestly just the glass quality and reticle clarity. With the 4T the dot is crispy and nice. The Romeo 5 is a legitimate starburst of squiggles with no defined center point at usable brightness. There’s also more hue in the glass. The 4T is very clear regardless of which reticle you use. It’s a good buy, but know what you’re giving up.
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Reviewed in the United States on March 29, 2025 by Matt I
Style: Red Dot Sight - Black (SOR5101)
Easy to put on, shot about a hundred rounds on my rifle and the scope is still on tight. Quality it about decent ill say. Red dot is very bright even in day. Overall great red dot sight for a cheap budget
Reviewed in the United States on February 6, 2026 by Kura
Style: Red Dot Sight - Black (SOR5101)
Great optic for CQB, easy to install, batteries last long, especially because of the shake to wake function. The Red dot is easy on the eyes and easy to zero.
Reviewed in the United States on February 18, 2026 by Amazon Customer
Style: Red Dot Sight - Black (SOR5101)
The verdict is still out on this scope because I see 3 red dots, in a triangle shape. Could be my eyes. It is well built and adjustments are click and work well. Brightness settings work good. Will update review when I figure this out.
Reviewed in the United States on December 8, 2025 by Alan