Shield Sights RMS [Reflex Mini Sight]: RMSc, RMSw and reviews

Shield Sights RMS on a Glock 43
| December 5, 2019
Categories: Guns

The first of the Shield Sights RMS series came out circa September-October 2016. The original Shield RMS was very small, though not as small as subsequent RMSc (q.v.).  All the RMS line is descended from the British CQB, which saw extensive service with MoD and other Commonwealth forces (and from the CQS, which was the civilian version of the CQB).

Shield RMS vs. Shield RMSc

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Shield Pistol Red Dot Sights: latest news

12-5-19 Glass lenses now a custom option on RMS (and RMSc and RMSw) sights.

Shield Sights has advised they’re adding an all-glass lens as a custom option for their whole line of micro red dot sights (RMS, RMSc, RMSw, and SMS sights).

Shield sight with glass lens option.

Via the release: “The addition of an all-glass lens, provides a solution to customers looking for maximum scratch resistance.  The glass lens is clear and uncoated for maximum clarity in all shooting situations. The glass lens has no magnification value and provides a true representation of the shooting environment. ”

Shield sight with glass lens options.

Custom Options & Features
-Colors include Blue, Bordeaux Red, British Racing Green, Bronze, Crimson Orange, Silver, Gunmetal Grey, and Purple.
-Type III Sulfuric Acid Anodizing
-Dot sizes include 4MOA and 8MOA
-Lens options SiO2 coated polymer, or all Glass lens
-Delivery within 6 weeks

RMS sight customization options

Other custom options on the Shield RMS and Shield RMS-C were offered earlier this year, to wit: “Lens options are a glass coated polymer, SiO2 Quartz coating which give customers the perfect balance of shatter resistance while providing an increased resistance to scratching found in typical glass lenses. The glass coated polymer lens ads no magnification or distortion to light that can be found in other options on the market. An all-glass lens will be available by the end of Q3 giving users maximum resistance to scratching. The glass lens is in the final stages of testing.”



RMS sight customization options

Shield RMS color options as of their most recent update included: Blue, Bordeaux Red, British Racing Green, Olive Green, Bronze, Crimson Orange, Electric Blue, Fiery Red, Gunmetal Blue, Gunmetal Grey, Neon Lime, Pink and Purple. All colors are a Type III Sulfuric Acid Anodizing treatment to the aluminum housing.


Remember the JPoint? The SMS sight is an all-polymer RDS that takes up the same real estate as the RMS at half the price. 📷@hun_tactical.

Shield Sights SMS





Shield RMS

The Shield Arms RMS (Reflex Mini Sight)  was the first of the RMS series, all of which evolved from the CQB (which was used by the British Ministry of Defence).

pistol red dot sight from Shield Sights


pistol red dot sight from Shield Sights

Reflex Mini Sight

The RMS is described by the manufacturer thusly:

Parallax free, clear polymer optic, which can withstand up to ten times greater shock impact than products using glass optics. Unlike many competing products, the RMS is designed without a red reflective filter on the lens to ensure minimal visual signature. The sight body is made from aerospace-grade aluminum and has an anodized matte black finish. Variable intensity drive circuit that senses target light levels and controls LED output giving optimum visibility of the dot against the target. Available in different dot sizes, tailored to your application. The RMS fits all mounts readily available for the SMS. The RMS is available with an optional battery draw that allows you to change the battery without having to unmount the sight.


RMS Specs

  • Light Source: Red light emitting diode (LED) No laser; completely eye safe No radioactive materials
  • Red Dot Size Options: 4 MOA dot 8 MOA dot
  • Lens: Reflex x1 (no magnification)
  • Lens Coating: Anti-reflection No coloured coating, minimises visible signature
  • Battery: One 3V lithium battery, CR2032
  • Battery Life:  2 to 3 years – average use >4 years – dark storage
  • Brightness Adjustment: Automatic
  • Brightness Range: Lowest – Compatible with Night Vision: Highest – Visible against the sky in bright daylight
  • Housing material: Aluminium
  • Colour: Matte black
  • Dimensions: Sight only (Length x width x height) 42 x 25 x 23 mm 1.7 x 1.0 x 0.9 inches
  • Weight: 17.5 grams / 0.61 ounces
  • Mount: A wide range of mounts are available.




Cowitness: Shield Sights

Don’t understand “co-witness”? Read a Language Lesson on that very topic: What is Co-Witness.

Shield Sights cowitness



Shield RMSc

Released in early 2018, the RMSc (or RMS-C) is the…wait for it…RMS Compact. Originally intended for sub-compact pistols like the Glock 43 and S&W Shield, the little red dot sight has seen wider use with the advent of new types of sub-compact handgun.

Shield Sights RMS (compact) on a Grey Ghost Precision G43

Shield RMSC on a Grey Ghost Precision G43.

The RMSc was released with the same bolt pattern as the original RMS (and for that matter the first Shield SMS). This allowed users with RMS-compatible slides to switch to the RMSc without undue hassle. A side accessible battery draw also allows for quickly changing out batteries.

Shield red dot mounted up for use.

The Shield RMS series is an increasingly popular option for the smallest of concealed carry pistols.


RMS (compact) on a GGP slide

Another Shield RMSC on a GGP slide.

RMSc Specs

  • Light Source: Red light emitting diode (LED) No laser; completely eye safe No radioactive materials
  • Red Dot Size Options: 4 MOA dot 8 MOA dot
  • Lens: Reflex x1 (no magnification)
  • Lens Coating: Hard coating with Anti-reflection No coloured coating, minimizes visible signature
  • Battery: One 3V lithium battery, CR2032
  • Battery Life:  2 to 3 years – average use >4 years – dark storage
  • Brightness Adjustment: Automatic
  • Brightness Range: Lowest – Compatible with Night Vision: Highest – Visible against the sky in bright daylight
  • Battery Fitting: Underneath.<
  • Housing material: Aluminium
  • Colour: Matte black
  • Dimensions: Sight only (Length x width x height) 40 x 23 x 22 mm 1.7 x 0.9 x 0.9 inches
  • Weight: 16.40 grams / 0.57 ounces inc Battery
  • Mount: A wide range of mounts are available. Fits existing RMS/SMS mounts.



Walther PPS M2 with Shield RMS

As red dots for pistol use became increasing popular some manufacturers began releasing handguns already so equipped: like this Walther PPS M2 equipped with an RMSc, reviewed on Shooting Illustrated.



Shield RMS-W

The Shield RMS-W (also referred to as RMSw) is a “ruggedized” and water-resistant version of the Shield RMS.

Shield Sights RMS-W

According to the UK-based manufacturer, “The Shield RMS-W is designed to resist damage from water or other harsh environmental conditions.  The RMS-W is gasket sealed to create a watertight fit between the slide and the battery compartment without the need of a special mounting plate.  When the sight is properly mounted it will remain watertight at depths of up to 20 meters for 30 minutes.”

Shield Sights RMS-W

Shield Sights RMS-W

According to the original release (c. December 2018), “The RMS-W also features a newly designed frame which adds thickness to the aluminum lens housing as well as a newly designed side profile.  The RMS-W will also be the first sight in the RMS line to benefit from the newly developed hard coated polymer lens.  These modifications have increased flex strength of the standard RMS sight by over 80% while maintaining the original viewing window and mounting footprint. The RMS-W will fit any slide that has already been cut for the RMS, RMS-C, SMS, or Jpoint.”

Shield RMSw Specs:

– The RMS-W is machined from aerospace grade aluminum
– Gasket sealed to ensure consistent waterproofing
– Increased thickness of aluminum housing
– Hard coated polymer lens to resist scratching
– Very fast automatic brightness adjustment
– Very low profile to Co-Witness standard iron sights
– 2-3 year average battery life with standard CR2032 battery
– Weight: 17.6 grams / .62 ounces battery included


Shield RMS Review (s)


RMSc Review – Springfield Hellcat (Mike Humphries)

“I have to admit I really like the Shield RMSc on the Hellcat OSP. The combination of the compact little red dot with the excellent U-Dot iron sights of the Hellcat gives me a great combination of options. I have the red dot right there whenever I need it, and I also have the irons backing it up in case anything happens to the optic.

A Springfield Hellcat with RMSc aboard, via "The Armory Life"

I personally have had trouble in the past with red dots on handguns with finding the red dot in the sighting pane — basically I would have to search a little bit to spot it. On the Hellcat OSP and the Shield, I use the co-witnessing U-Dot iron sights to get me “in the zone” for the first fraction of a second. By starting to align the iron sights like I would with a normal pistol, I get the gun aligned properly so I can quickly pick up the red dot. The more I do it, I find I’m automatically aligning the pistol on the target to see the red dot without having to even think about the irons. As with everything, practice makes perfect.”

Read the remainder of Hellcat Reflex on Armory Life.



RMS Review: The Firearm Blog (Nathan S.)

“Typically, I am wary of self-adjusting optics. Almost invariably, those models have major issues from shooting from dark light into high light and vice versa. The Shield RMS did not – if only because it defaults to being a bit brighter than one is used to. This leads to some fuzzy outline on the dot when shooting into low-light, but not so much as to be distracting. Its bright that the 4 MOA goes to 8. On the converse, the optic is bright enough in low-light that shooting to high makes the dot a fine circle. While not tested with night vision – Shield states the dot will adjust to night-vision compatible in suitable environments…

TFB Review: Shield RMS “Reflex Miniature Sight”

…Putting rounds down range is as easy as put the sight on the target and pull the trigger. When using the Glock front sight, I especially liked the rear notch. As one who practices finding the dot by establishing the iron sight picture, the integrated sight is a real benefit. Even re-mounted with the taller aftermarket sights, it worked well – I just did not like the taller irons taking up more of the sight picture – not the fault of the RMS.

As with any sight mounted to the slide, it takes practice to follow the dot during recoil and reset for follow-up shots. At first, the bouncing red dot is unnerving, but with a hundred rounds down the pipe, it becomes comforting to watch the weapon’s behavior and track the dot back onto the target – a big boon over standard irons which require getting the rear sight back into focus as well. For close-in targets, I did not see much improvement in splits or accuracy, but targets 15 yards and out, the RMS shined bright like the red dot.”

Read the rest of this review on TFB.


Shield Sights Review: TTAG on the RMS (Jeremy S.)

“Thanks to the polycarbonate lens, there’s no distortion or color shift when looking through the RMS. It doesn’t require a red coating and gets only an anti-reflection and anti-scratch treatment. Glare and “visual signature” from downrange are reduced as compared to a glass lens RDS. Additionally, the polymer lens is both lighter weight and more impact resistant than glass. It falls short vs. its glass brethren only in scratch resistance…

RMS review on The Truth About Guns

…A light sensor in the RMS adjusts the dot’s brightness automatically. And very well, I might add. For instance, if you’re in deep shade but your target is in full sun, the sensor does a good job of recognizing the brightness of your target area and adjusting the dot accordingly…

…I think the SHIELD RMS is the best micro red dot sight on the market, or at least as good as it gets. No buttons, no settings, it just works and works well.”

Read the rest of the original article on The Truth About Guns.


Shield Sights Video Overview –

(They’re also on eBay – lots of Glock parts and accessories available there.)


Zero your Shield RMS




**BTW!** This Big Daddy Unlimited thing is the real deal. Maybe not the tacticoolest name, but they have over 120,000 products available at dealer pricing if you know the secret handshake. Check ’em out, no shit. 


Big Daddy Unlimited Gun Buyers Club

Buy your blaster at distributor cost – use what you save for bullets and training.


  1. Charles Monroe

    how can I mount a shield rms to a non mos glock35 gen3

    • Mike

      The best way is to have your slide milled for the Shield Sight footprint. Another option is you can use their rear sight dovetail mount. The rear sight mount puts the optic up to high for a standard co-whitness thought.

  2. Mad Duo

    James, we rarely post prices in a news piece BECAUSE THEY CHANGE. We’re not ashamed, we don’t actually give a shit. They’re not OUR product, we’re just telling you about ’em. You do realize you could just click the link and POW just like magic you’ll be looking at where you can buy them, right? And that there will be a current price on that page? Yep, just like fucking magic. Takes less time to click that link than it does to write 2 different comments bitching about the same damn thing.

  3. james brooks

    I was referring t the RMSc shield sights. No prices not even in the led handguns magizine.WHY don’t you post your prices are they really that HIGH,that’s what I’ve always found to be true ,if there’s no price them it’s priced to high.true words.

  4. James brooks

    Are they that expensive that your ashemed to give a price.I never an understand someone having something for sale and not posting a’s really disturbing.



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