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  4. Red Dot Review: Shield Sights Clear Hood OMSsc

Shield Sights recently capped a decade of pistol mini-sight innovation with one of its most interesting designs: a red dot sight for small-form-factor handguns featuring a translucent roof.

We have a review of the new Shield OMSsc. 

Quick Summary: The new Shield Sights OMSsc has an interesting design that's possibly the first of its kind. It shoots well, and you don't have to search for the dot as much as with other open-emitter micro red dots.
 

Table of Contents

Overview
Specs
Features
On the range
Pros and Cons
Conclusion

Overview


If you have been paying any attention to pistol optics, you know Shield's Reflex Mini Sight, or RMS, which first broke cover at the IPSC European Handgun Championship in 2016 before cruising to success on the consumer market. Then came its slimmed-down little brother, the Shield RMSc – with the little "c" standing for "compact" – one of the first micro red dots designed specifically for the sub-compact and single-stack pistol market. You know, guns like the G43 and Smith & Wesson Shield. 

Take that same form factor and proven performance, add a panoramic see-through top hood, and you have the new Open Mini Sight Sub Compact, or OMSsc.

Thus: 
 

A Shield OMSsc 4 MOA red dot installed on a Springfield Armory Hellcat .380 ACP micro compact pistol
A Shield OMSsc 4-MOA red dot installed on a Springfield Armory Hellcat .380 ACP micro-compact pistol. (All photos: Chris Eger/Guns.com)


For full disclosure, Springfield Armory sent Guns.com a Hellcat .380 for review purposes in August 2025 with a Shield OMSsc 4-MOA red dot installed. Since we spent three months running that pistol with this interesting new sight mounted, we felt a separate review of the sight was in order. 
 

Specs
 

  • Dimensions: Sight only (L x W x H): 1.6 x 0.75 x 0.85 inches
  • Optics Footprint: Shield
  • Weight: 14.7 grams / 0.51 ounces (excluding battery)
  • Light Source: Red light-emitting diode
  • Red Dot Size Options: 4 MOA and 8 MOA
  • Lens: Square-shaped glass lens 
  • Battery: One 3V lithium metal battery, CR1632, bottom loading
  • Battery Life: 9,000 hours in average daylight
  • Water Immersion: 3 feet for 30 minutes (IP67)
     

Features
 

A Shield OMSsc 4 MOA red dot
Billed as the world’s first translucent roof micro red dot technology, the Shield OMSsc features an aerospace-grade T6 6082 aluminum housing with an acrylic hood. Of note, all Shield sights are made in Crewkerne, England. NO Chinesium here. 
A Shield OMSsc 4 MOA red dot
The pitch about the clear-ish hood is that it allows an unobstructed field of view, allowing users to acquire a target faster and more accurately. In our experience, the hood seems to fade away in the focal plane. 
A Shield OMSsc 4 MOA red dot
Further, by allowing more ambient light to the photo diode, the clear hood boosts the eye-safe LED's output for improved visibility inside the reticle. 
A Shield OMSsc 4 MOA red dot
The OMSsc is short as well as narrow, without lapping over the 0.85-inch side of the Hellcat. 
A Shield OMSsc 4 MOA red dot
Adjustments and footprint are the same as the standard RMSc, with a small hex wrench used for elevation adjustment at the top rear of the sight and windage at the right rear. 
A Shield OMSsc 4 MOA red dot
Sadly, as a byproduct of the sight being small enough to fit on a Hellcat .380 or similar, there is only so much real estate. The OMSsc, like the RMSc, sits atop its battery, which means you have to dismount the optic to change it out. On the upside, Shield specs the OMSsc to run 9,000 hours with a single CR2032. 
A Shield OMSsc 4 MOA red dot
We found the OMSsc to sit low enough on the direct milled slide of the Hellcat .380 to allow easy co-witness of the installed rear sight. Also note the rounded, snag-free edges for a smoother, faster draw with less fear of printing.
A Shield OMSsc 4 MOA red dot
The glass lens on the OMSsc doesn't have any filters and is clad in a color-free hard anti-reflective coating to minimize visible signature.


There is no manual brightness adjustment to the OMSsc, which simplifies things a little. The "always on" automatic brightness levels are billed as both compatible with night vision and visible against the sky in bright daylight. While not a huge fan of auto brightness on red dots, we have to admit that this one always seemed just bright enough to show up and be useful without occluding the target, no matter if shooting in low light on an indoor range or under the scorching death ball in the sky that is Mississippi sunlight in August. 
 

On the range


We found the Shield OMSsc to have a sharp dot while on the range, both indoor and out, and "pop" into view quickly. 
 

A Shield OMSsc 4 MOA red dot target
The 4-MOA dot held up to its name on the range. 


Further, we used, and frankly abused, the OMSsc in testing, repeatedly racking the slide of the Hellcat by running the slide against the barricade by the leading edge of the optic, and never observed a shift in POA/POI. 

Candidly – and stay with me here – I am just not a fan of micro red dots on carry guns, despite having extensive use with both. Don't get me wrong, I own probably 10 rifles right now with electro-optic red dots on them as well as several full-sized pistols with large mailbox-sized enclosed red dots (think ACRO, Steiner MPS, Burris Fast Fire E, etc) but have just always struggled to "find the dot" in a fast enough time on a open emitter MRD to justify losing a half-second on my draw.

I find myself faster on target when drawing a small gun from concealment when using iron sights. This may be because I've been shooting handguns for 40 years, with a lot of that being on guns with very poor sights (looking at you, J-frames). Micro carry red dots only came into play in the past decade, so I default to what I am comfortable using. On larger, more full-sized pistols, I can get a better grip and don't suffer the same "bounce and adjust" when coming up on target, especially when using a big honking, almost competition-sized enclosed dot. 

However, with the Shield OMSsc, I felt the time shift in bringing the dot to my eyes, a feeling more akin to using a larger sight. Cutting back on the hood without cutting back on the hood helped me to very rapidly "hook into" the dot, if you can follow. TL;DR: I liked it and shot well with it, without having to search for the dot as much as I usually do with other open emitter red dots.
 

Pros and Cons


Pros

  • Light at 0.51 ounces
  • Narrow enough not to overlap slide sides, even on thin guns
  • We found it perceptibly faster on target than comparable open emitter dots
  • Usable
  • Auto-brightness feature works
  • "Always on" feature works
  • Rounded edges for better concealability and carry
  • Not made in China

Cons

  • Has to be removed from the pistol to replace the battery
  • Cannot adjust the dot brightness
  • Only offered in 4 MOA and 8 MOA, nothing tighter
     

Conclusion


We came across the OMSsc while doing a review on a pistol and thought enough about it to do a separate review of the optic. Naturally, one would only do this to either be the town crier to shame the optic for poor performance, or to point out how original or pioneering it came across while in use. This review is the latter.

It is a good sight.
 

A Shield OMSsc 4 MOA red dot
The Shield OMSsc ships with two sets of installation screws, adjustment tools, and a battery, for an MSRP of $459. 
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