RMSc VS RMRcc Footprint

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Hey Shooter! Welcome to the Comparison of RMSc VS RMRcc Footprint.

I’vs spent considerable time testing and comparing the RMSc Vs RMRcc Footprint red dot sights, I’m thrilled to share my insights. 

My aim is to guide you through the intricacies of each footprint, their practical applications, and the nuances of mounting them on various firearms. 

RMSc Footprint

Shield RMSc with its RMSc footprint represents an evolution from the original Shield RMS while keeping the same mounting hole dimensions. 

Notably, it sports a slimmer optic size. My testing of various red dots, including the Shield RMSc, Swampfox Sentinel, and Sig Sauer ROMEO Zero, revealed their adaptability. 

A point worth mentioning is the Holosun 507K X2, which, although similar, necessitates additional adapter plates for proper fitting. The slim form factor of the RMSc is a definite plus for those looking for a more compact and less noticeable sight on their firearm.

RMRcc Footprint

Delving into my experiences with the RMRcc footprint optics, particularly through the Trijicon RMRcc red dot sight, I found its compatibility intriguing. 

This footprint stands out for fitting specific firearms, such as the Glock 43 MOS, facilitated by adapter plates from brands like CHPWS or Trijicon. 

In my explorations, I realized the RMRcc footprint isn’t common in the market, which often necessitates custom solutions like acquiring a precut slide or opting for custom milling for a perfect fit. The snug and secure attachment it offers is paramount, ensuring consistent accuracy, which is particularly critical when you’re firing rapidly.

Differences Between RMRcc Vs RMSc Footprints

In comparing the RMRcc and RMSc footprints, their practical differences become quite apparent. The RMRcc footprint is notably longer, which often leads to incompatibility with most handgun slides designed for the RMSc footprint. 

Both designs incorporate recoil lugs, a feature I’ve found to be highly effective in preventing any movement during recoil, thus ensuring sustained accuracy.

The RMRcc is specifically tailored for subcompact slides, setting it apart from the more commonly seen RMR footprint. Conversely, the RMSc footprint is increasingly popular in the current market, particularly due to the growing number of subcompact pistols.

Understanding Aftermarket Adapter Plates

Throughout my exploration in the world of red dot sights, I’ve encountered a variety of aftermarket adapter plates.

These components are essential for aligning specific red dot footprints, like the RMRcc and RMSc, with different handgun slides. 

Manufacturers such as CHPWS and DPP are known for their wide array of mounting hardware. It’s imperative to ensure the adapter plate you choose is compatible with your specific firearm model.

In my experience, selecting the right combination of sight and plate is crucial. It can greatly improve your shooting by providing the necessary stability and maintaining accuracy.

Mounting the RMSc 

Use Threadlocker: When mounting your red dot sight, it’s crucial to secure the screws properly. Vibration from firing can cause screws to loosen, affecting your sight’s zero. 

To prevent this, apply a small amount of threadlocker, like Blue Loctite, to your screws. This holds them in place without making them too difficult to remove if needed. Avoid using Red Loctite as it permanently locks screws in place, which isn’t ideal for sights that may need to be removed for maintenance or cleaning​​.

Proper Placement of the Sight: Push your sight forward on the mounting rail before tightening it down. Due to recoil, any mounted accessory on a rifle tends to move forward. 

By placing your sight forward and then tightening it, you can ensure that it stays securely in its position even under the recoil of firing​​.

Mounting Position on the Rail: For RMSc Footprint Optics, it’s recommended to mount the optics on the forward half of your top rail. 

This placement doesn’t affect the sight’s performance due to the lack of eye relief concerns with red dot sights and provides a greater field of view. It also allows room for additional accessories like backup iron sights or a magnifier behind the optic​​.

Mounting the RMRcc 

Understand the Mounting Options: The RMRcc is designed for concealed carry and fits well on smaller CCW pistols. 

It can be attached to pistols with a rear sight dovetail cut, which is a common feature in many non-optic ready (non-OSP) pistols like the original Springfield Hellcat. For pistols that do not have a slide cut for mounting a reflex sight, Trijicon offers adapter plates to facilitate mounting the RMRcc​​​​.

Using an Adapter Plate: If your firearm doesn’t have a slide cut for the RMRcc, you can use an adapter plate. For example, for the standard Hellcat, you can push out the rear dovetail sight and add an adapter plate to mount the RMRcc. 

Trijicon provides various mounting options and adapter plates for different pistol models, ensuring a secure and precise fit​​​​.

Final Verdict

In conclusion, the journey through the realms of RMSc and RMRcc footprints has been enlightening. The RMSc, with its slim profile, suits a variety of compact firearms and offers versatility without compromising on performance. 

On the other hand, the RMRcc footprint, tailored for subcompact slides, stands out for its specific compatibility and secure attachment, essential for consistent accuracy in rapid firing scenarios. 

The exploration of aftermarket adapter plates further emphasizes the importance of compatibility and precision in enhancing shooting experiences. Both footprints, with their unique features, cater to different preferences and requirements, making them significant choices in the world of red dot sights. 


What red dots fit the RMSc footprint?

Red dot sights compatible with the RMSc footprint include the Swampfox Sentinel 1×16, UTG OP3 Mini Micro, and Vector Optics Frenzy-S models in various dimensions, all sharing the Shield mounting standard.

Is RMS the same as RMSc?

No, the RMSc is a slimmer version of the RMS, designed for single stack pistols like the Glock 43 Mos, Smith & Wesson Shield, and the 1911, offering a more compact solution for conceal carry handguns.

What is the RMRcc footprint?

The RMRcc footprint is designed for a broad range of firearms, particularly valuable for shooters seeking a versatile, lightweight red dot sight suitable for multiple platforms. Its light weight makes it ideal for those aiming to minimize the overall heft of their firearm setup.

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