Ruger ReadyDot Reflex Sight 15 MOA RMSc Footprint

The Ruger ReadyDot reflex sight is a battery-free micro optic engineered for fast, instinctive target acquisition on compact EDC pistols. Designed to co-witness on the Ruger MAX-9 and compatible with Shield RMSc footprints, it integrates seamlessly with backup iron sights for confidence-driven carry use. Its low-profile shape and visual indexing geometry support rapid alignment without added bulk or complexity.
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Ruger ReadyDot Features

The Ruger ReadyDot reflex sight is built as a streamlined micro reflex sight, utilizing a fiber-illuminated 15 MOA dot that automatically adjusts to ambient light conditions. Battery-less operation eliminates power management concerns while maintaining a highly visible aiming reference at typical concealed-carry distances. True 1X performance keeps the sight picture natural and immediate for defensive use.

Elevation and windage are fixed to preserve simplicity and reliability, allowing the shooter to focus on presentation and trigger control. The optic is designed to co-witness with iron sights, reinforcing redundancy for everyday carry. Included mounting hardware supports installation on the Ruger MAX-9, delivering a purpose-built solution optimized for real-world EDC demands.

Ruger ReadyDot Specifications

  • Manufacturer: Ruger
  • Model: ReadyDot
  • Optics Type: Reflex sight
  • Magnification: 1X
  • Reticle: Dot
  • Dot Size: 15 MOA
  • Illumination: Fiber illuminated, battery-free
  • Adjustment: Fixed windage and elevation
  • Mount Pattern: Shield RMSc
  • Compatibility: Ruger MAX-9, RMSc footprint pistols
  • Included Accessories: T10 Torx wrench, two M4x0.7 8mm screws
More Information
Optic Footprint Shield RMSc
Threaded Barrel No
Condition New in Box
Finish Per Color Black
Manufacturer Ruger
Manufacturer Part Number 90742
Model ReadyDot Reflex Sight
Type Red Dot Sights
UPC 736676907427

⚠ WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to WWW.P65WARNINGS.CA.GOV

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Questions And Answers

Will this fit the Ruger Max .380?

Asked by Brian T. on May 12, 2025

It will fit ANY RMSc cut slide or adapter! As with most firearm questions, check your Manual!

Answered by coyote on May 12, 2025

It will fit ANY RMSc cut slide or adapter! As with most firearm questions, check your Manual

Answered by Anonymous on May 12, 2025

What specific plate is necessary to mount onto a Ruger Security 380?

Answered by Anonymous on May 14, 2025

YES

Answered by Anonymous on May 13, 2025

Will this fit my CZ P10 F 45?

Asked by SmashNeal34 on Jan 8, 2026

It might fit but it’s not adjustable it is made to fit Ruger max 9 you are taking a chance that it will not be zeroed to your handgun .

Answered by Anonymous on Jan 9, 2026

It's a standard RMS mount, no plate required,,,,If your optic ready CZ has a RMS pattern mount, it should mount

Answered by Anonymous on Jan 9, 2026

I dont have aby idea.

Answered by Anonymous on Jan 9, 2026

Will this fit on a SR9C?

Asked by Anonymous on Jun 22, 2023

No. There is no possibility. The SR9's loaded chamber indicator occupies the space where any sight base would need to mount.

Answered by Anonymous on Jul 20, 2023

If the sr9c is compatable with the Rmsc red dot, then the answer would be yes. the spec sheet for your pistol should tell you what the foot print is.

Answered by Anonymous on Jul 15, 2023

You can mount an optic on a Ruger SR9C by pi up a Galloway Precision optics mount. I did this and it works great without having to mill the slide

Answered by Unitask on Dec 23, 2024

Will this red dot fit a canik mete mc9?

Asked by Anonymous on Jul 19, 2026

The Canik METE MC9 slide is micro-milled to accept RMSc (Shield Standard) footprint optics, and because the Ruger ReadyDot also utilizes the RMSc footprint, it will mount directly to the pistol without the need for adapter plates.

Answered by Anonymous on Jul 19, 2026

most likely...fits all the standard RMS mounts

Answered by Anonymous on Jul 20, 2026

Will this fit a Ruger 380 LCP MAX?

Asked by SmashNeal34 on May 18, 2026

From Grok: No, it won’t fit directly. The standard Ruger LCP Max isn’t optic-ready—its slide isn’t milled for an RMSc footprint. You’d need an aftermarket dovetail mount plate that replaces the rear sight, like the ones from Galloway Precision, which then accept RMSc optics.  The Ruger ReadyDot (or Ready Dot) itself uses the RMSc footprint, but Ruger also makes a special factory version of the LCP Max that comes with a ReadyDot already installed in a unique rear-sight dovetail setup—not the same as bolting on a standard RMSc optic.  If you want a red dot on your LCP Max, grab one of those adapter plates and an RMSc sight—it’s the common workaround.

Answered by Anonymous on May 18, 2026

I would say so, as long as it's optic ready!

Answered by Anonymous on May 30, 2026

Will it fit the Ruger 57 hand gun?

Asked by Shelton P. on Nov 18, 2025

No, it will not.

Answered by Anonymous on Nov 18, 2025

Yes

Answered by Anonymous on Dec 17, 2025

Would this sight fit the Ruger 57?

Asked by Anonymous on Jun 24, 2025

You will need an adapter plate This one is for Rmsc footprint if you insist on using the Ruger Red Dot but keep in mind won't work well once sun is gone. Ruger has a mounting plate on its website for the 5.7 also outerimpact has a plate that takes different size I couldn't use the ruger ready dot once the sun went down or was pretty dark so ipurchased one that had battery and was multi-reticle DOT, cross hair circle, and Dot+ crosshair circle, check it out here. It's a Vector optics Frenzy-S 1x17x24 multi reticle Vector optics Main site for frenzy s Vector2007dotcom For the money the ruger dot is nice. Whatever you decide enjoy it.

Answered by Anonymous on Jun 25, 2025

As long as it has a RMSC footprint

Answered by Anonymous on Jun 24, 2025

Does this fit a Sig M18?

Asked by Anonymous on Dec 15, 2023

Not likely as it's a rmsc footprint

Answered by Anonymous on Dec 15, 2023

No

Answered by Anonymous on Dec 19, 2023

Will this fit a Ruger Security .380?

Asked by Gregg on Nov 9, 2023

not by itself. You would need an adapter plate. some places sell one that replaces the rear sight without milling.

Answered by Anonymous on Nov 10, 2023

As far as I know the Ruger Security 380 does not come optic ready ie it isn’t prepped to have an optic installed.

Answered by Anonymous on Nov 10, 2023

Will this fit, without modification, on a S&W Equalizer?

Asked by Bill Mc on Jun 22, 2023

Yes. Ready dot fits Shield RMSC mounting FOOTPRINT. Your pistol manual should clearly say that is the cut in the EQUALIZER. As to APPROPRIATENESS, it works very well for rational DEFENSIVE shooting DISTANCES - as intended. 10 yd / 2" groups (off hand, of course). 20 yd, it will open up as the dot grows and your poa becomes less defined, so LIKELY to be 5-6" groups or 8 of 10rds on an 8" steel plate - still EFFECTIVE. On the little max 9 it has proven BENEFICIAL for gross defensive accuracies though not "essential"...more like "interesting" especially for the co-wittness with it's iron sights. The dot makes it clear if you push the aim Off With a trigger pull. As to the magic, battery-less illumination, it's been between very bright and sufficiency bright in varying conditions including SOFT/dim lamp-lit indoor space. Can't imagine it will do much if you're already stumbling into furniture in the dark. The price is really good for answering questions ABOUT using defensive handgun OPTICS - NOT for precision or long distance. It should work well In MOST defensive SITUATIONS & should make your targets look a bit better. We - 2 ok shooters - need to live with it longer to figure out if the current RED-DOT rage on defensive handguns is valid or just more extraneous marketing b.s. our THEORY: if you think you need one, first figure out how to shoot well without one, then get one to play with.

Answered by Anonymous on Jun 22, 2023

The Equalizer uses a "modified RMSC" MOUNTING CONFIGURATION AND THE rEADY dOT USES A "sHIELD rmsc" CONFIGURATION. i DO NOT KNOW HOW THE TERM "MODIFIED" COMPARES TO "SHIELD" IN THE CONTEXT PROVIDED OTHER THAN THEY ARE BOTH CLAIMING rmsc AS A COMMON FOUNDATION. tHIS QUESTION IS BEST ASKED DIRECTLY TO rUGER OR TO s&w TECH OR CUSTOMER SERVICE DEPARTMENTS.

Answered by Anonymous on Jun 22, 2023

Reviews

Rated 4.5 out of 5 stars based on 45 reviews.

  • 5 stars: 33 reviews (73%)
  • 4 stars: 4 reviews (9%)
  • 3 stars: 5 reviews (11%)
  • 2 stars: 3 reviews (7%)
  • 1 stars: 0 reviews (0%)

It's functional, inexpensive, and requires no fiddling to make it work. But it's just OK

Rated 3 out of 5 stars by Anonymous on Jul 27, 2023

It works as intended, the dot seems to make me shoot low if I place it directly on my target. I had to teach myself to hold the dot above my factory sights on the ruger max 9. The good- yes it works. it does capture light pretty well though it's not the best in lower light conditions. The bad/weird it does not (and cannot) be zeroed, and out of the box you will need figure out where your gun hits to be accurate with it. I find that the dot can be hard to find, but i am not used to red dts on pistols that much. the dot is huge-15 moa which is great for fast target acquisition, but it is not for super precise shooting. Overall, for the price it is hard to go wrong trying it out, but if you want adjustability, a bright dot all the time, shake-awake features, a smaller dot, spend a little more and buy something better. This if my first red dot on a pistol that i own, and it is decent for the price, worth a try.

Great sight for old eyes.

Rated 5 out of 5 stars by Anonymous on Jul 6, 2023

I like it. It's on a P-365 and works like a charm. Big dot, easy to find, perfect for these short barreled carry guns that are mostly going to be used at 25 yds. or less. Doesn't need a battery and actually doesn't need to be adjusted, the dot lines up perfectly with the factory sights. Keep yourself out of situations where it;s completely dark and you will be ok with this sight.

I love mine!!!

Rated 5 out of 5 stars by Anonymous on May 30, 2026

Awesome site! So simple, no battery to die, zeroed when mounted to my MAX-9!

Review

Rated 5 out of 5 stars by Anonymous on Feb 14, 2026

Ruger Readydot Has been a great sight. After passing over 500 rounds through my gun there was no issues at all with Ruger Ready Dot. It's accuracy has been perfect at holding zero. I highly reccomend it and I promise that you will be truly, amazed. It just goes to show that there are budget friendly options out there that not only achieve but go beyond .expectations! Ruger Readydot = 'Game Changer' K. East, Bunkie Louisiana!

Review

Rated 5 out of 5 stars by Anonymous on Dec 6, 2025

Fits perfectly and I love it, it's on target. Just make sure it's all the way down on your fire are. Flat and flush.

Fantastic invention, absolutely love it!

Rated 5 out of 5 stars by Anonymous on Feb 1, 2024

I ordered this without actually having a firearm to install it on, because I thought it was a great idea not having to worry about batteries going dead. I've sinced purchased a Ruger Mark IV Hunter and the red dot adapter plate. I absolutely love the combination! accurate and totally fun to shoot!! I wish it could fit on more firearms as I would certainly purchase more of them!

Affordable and Accurate

Rated 5 out of 5 stars by Anonymous on Jul 30, 2023

Ordered this optic with a very specific use case in mind and had my PSA Dagger Slide milled for it. I wanted an optic that would never need to be charged or have batteries replaced and wouldn’t have to be zeroed. A fire and forget solution. And for that, this thing is right on the money. Funny enough, the slide milling was more expensive than the optic LOL! The optic is great though, POA/POI out to 20m with 115gr reman ammo and the size of the dot makes it very easy to pick up for fast shooting.

Inexpensive and it WORKS!!!

Rated 5 out of 5 stars by Anonymous on Jul 14, 2023

I love using the red dot on my defensive pistols, but i hate having to replace the batteries about every 18 months. In some cases, it is just the annoyance of having to take it off, replace the battery and put it back on the pistol. In other cases because you also have to re-zero the red dot. This fit almost perfectly on my hellcat pro. I just had to make sure to put the front of the sight in place and lower the rear. When i didn't do that it was about 8" high at 10 yards. The dot is very visable and it is large enough to be able to pick up very quickly. I may not get as tight a grouping with this size dot as with the 2 moa dot on my other hellcat, but that is not the purpose of it either. this is well worth the very low price i paid for it. well done ruger!

Review

Rated 3 out of 5 stars by Anonymous on Jun 15, 2023

The window has a lot of reflection making it hard to see the target. The dot is rather dim indoors. Doesn't sit on the RMSC mounting plate securely.

Ruger ReadyDot

Rated 5 out of 5 stars by Anonymous on Oct 9, 2026

I'm extremely pleased with this optic. I put it on a Smith and Wesson Shield Plus and although I haven't taken to the range yet, the red dot does appear to line up just right with the sights. It did require me purchasing some additional set screws as the ones that come with the Shield Plus are just long enough to hold the plastic cover for the slide, but not the optic, and the screws that come with the optic are the correct size for the Ruger Max9 and is a different size from Smith and Wesson. I live the size and ease if use of this optic so far dry firing it, and I live the face that it is fiber optic and I will not need to buy batteries. The only issue is low light means the optic will either not work or be low kit, however my Shield Plus also came with a really nice set of night sights, so for me that's not an issue. For the price and what you get with the ReadyDot, as long as you know its few shortcomings and are okay with them, it seems like its well worth the cost of this optic.

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