Leapers UTG Super Slim RDM20 Mount – Glock Rear Sight Dovetail Review

The Leapers UTG Super Slim RDM20 Mount – Glock Rear Sight Dovetail: A Review After Real Use

As someone who has spent over a decade pushing gear to its limits across diverse environments—from the sterile quiet of a lab bench to the gritty realities of a workshop, and out into the unpredictable field—I approach every piece of equipment with a critical eye. When I needed a reliable way to mount a micro red dot sight onto a Glock pistol without resorting to a slide cut, the Leapers UTG Super Slim RDM20 Mount – Glock Rear Sight Dovetail caught my attention. Its promise of a low-profile, robust solution that utilizes the existing rear sight dovetail seemed like a practical answer to a common firearm accessory dilemma.

My journey to this particular mount began with a desire to outfit a trusty Glock 19 with an optic for faster target acquisition, but I was hesitant about the permanence and cost of milling the slide. I’d explored some less invasive methods before, some of which were flimsy or required compromising other parts of the firearm. The UTG mount presented itself as a straightforward, potentially less expensive alternative that seemed to prioritize simplicity and utility. I considered some alternative brands that offered similar dovetail mounts, but often they lacked the specific footprint or material quality I was looking for.

Upon unboxing, my initial impression was one of solid, no-nonsense engineering. The Leapers UTG Super Slim RDM20 Mount – Glock Rear Sight Dovetail felt substantial, crafted from what appeared to be good quality aluminum, with a matte black finish that promised to resist glare and wear. It’s not often that such a seemingly simple component inspires immediate confidence, but this mount managed to do just that.

Real-World Testing: Putting Leapers UTG Super Slim RDM20 Mount – Glock Rear Sight Dovetail to the Test

First Use Experience

My primary testing ground for this mount was a standard shooting range environment, specifically paired with a Glock 19. The scenario was straightforward: replace the factory rear sight with this mount to attach a Docter/Noblex footprint micro red dot sight. The installation process was initiated by removing the original rear sight from the Glock’s slide dovetail.

The mount then slid into place with a satisfying snugness, requiring only minor adjustments to achieve a perfect fit within the dovetail cut. I used the provided installation hardware, which consisted of a small screw that secured the mount firmly into the existing rear sight channel. This process took mere minutes and required only the basic tools that were included in the package, which was a welcome change from some complex aftermarket installations.

Performance under simulated stress conditions, like rapid firing drills, was also observed. The mount held the optic steady, and I experienced no shift or loosening of the optic after multiple magazines were expended. Even when exposed to the typical range dust and the occasional minor bump against my range bag, the mount maintained its integrity and the optic remained zeroed.

Extended Use & Reliability

After several weeks of consistent use at the range and a period of being carried in a dedicated holster, the Leapers UTG Super Slim RDM20 Mount – Glock Rear Sight Dovetail has proven its worth. There have been no signs of the mount becoming loose or developing any play in the dovetail. The 6061-T6 aircraft-grade aluminum construction seems to be living up to its billing, showing only minor cosmetic scuffs that are entirely expected from regular handling.

Cleaning and maintenance have been remarkably simple. A quick wipe-down with a soft cloth and a mild solvent is all that’s needed to keep it looking clean and functioning optimally. I haven’t noticed any degradation in its grip or any corrosion, even after exposure to a light misting of rain on one occasion.

Compared to previous experiences with flimsy plastic mounts or those that required more intrusive modification, this UTG mount stands out. It offers a durability and reliability that punches well above its weight class, especially considering its accessible price point. It has performed consistently, proving that it’s not just a temporary fix but a dependable component for adding an optic.

Breaking Down the Features of Leapers UTG Super Slim RDM20 Mount – Glock Rear Sight Dovetail

Specifications

The Leapers UTG Super Slim RDM20 Mount – Glock Rear Sight Dovetail is a precisely engineered piece of kit designed for a specific purpose. It is machined from 6061-T6 aircraft-grade aluminum, which is a standard for many high-quality firearm accessories due to its excellent strength-to-weight ratio. The matte black finish not only provides a stealthy appearance but also helps to reduce glare, which is crucial for maintaining sight picture clarity.

The mount boasts a 0.15″ saddle height, meaning it adds a minimal amount of elevation to your optic. This is important for maintaining a lower bore axis and a more natural sight picture. With an overall length of 1.84 inches and a width of 1.10 inches, it is designed to be unobtrusive.

Crucially, this mount features an Optic Cut compatible with the Docter/Noblex footprint. This means it is specifically designed to accept micro red dot sights that adhere to this popular mounting standard. The mount is engineered to fit Glock Double Stack Pistols, utilizing the rear sight dovetail for its primary anchoring point. The inclusion of installation hardware and tools means users can mount it right out of the box, which is a significant convenience.

Performance & Functionality

The primary job of the Leapers UTG Super Slim RDM20 Mount – Glock Rear Sight Dovetail is to securely hold a micro red dot sight in the rear sight dovetail of compatible Glock pistols. In this regard, it performs exceptionally well. The mount provides a stable platform, and once torqued down correctly, it holds the optic with zero perceptible wobble or shift, even under recoil from rapid firing.

A key strength of this mount is its ability to achieve a relatively low profile. While it does sit the optic higher than a direct slide cut, it is significantly lower than many bulky universal mounts. This improved height allows for easier co-witnessing with iron sights if you choose to retain them or provides a more comfortable sight picture for many shooters.

However, a noted weakness, as touched upon by some user feedback, is that it does raise the optic considerably. For some shooters with smaller hands or those accustomed to a very low sight radius, this elevated position might feel a bit high, potentially impacting the natural feel of the firearm. While it functions perfectly, the inherent compromise of not milling the slide means the optic will always sit higher than an integrated solution.

Design & Ergonomics

The design philosophy behind the Leapers UTG Super Slim RDM20 Mount – Glock Rear Sight Dovetail is one of minimalist efficiency. The machined aluminum is smooth to the touch, with no sharp edges that could snag on clothing or cause discomfort. The matte finish provides a good grip surface, preventing accidental slips during installation or handling.

Ergonomically, once mounted, the mount itself is largely out of the way. Its low profile ensures it doesn’t interfere with the shooter’s grip or operational clearances around the slide. The simplicity of its design means there’s virtually no learning curve; it’s a passive component that integrates seamlessly with the pistol and the optic.

The inclusion of a securing screw that threads into the mount itself, rather than solely relying on friction within the dovetail, adds a layer of security. This design choice enhances the overall stability and prevents any potential for the mount to walk out under repeated recoil, which is a common failure point for less robust designs.

Durability & Maintenance

Given its construction from 6061-T6 aircraft-grade aluminum and the robust matte black finish, the Leapers UTG Super Slim RDM20 Mount – Glock Rear Sight Dovetail is built for longevity. For its intended purpose as a rear sight replacement optic mount on a pistol, it’s designed to withstand the rigors of regular range use and concealed carry.

Maintenance is virtually non-existent beyond occasional cleaning. The material is corrosion-resistant, and the finish is durable enough to resist scratches from everyday handling. There are no complex moving parts to wear out, and the primary point of failure would likely be the securing screw, which is a standard component and easily replaceable if needed.

Potential concerns, though minor, could arise from overtightening the securing screw, potentially stripping the threads, or from extreme impacts. However, under normal operational stress and with proper installation, this mount should last for the lifespan of many pistols. Its solid construction inspires confidence that it won’t fail when you need it most.

Accessories and Customization Options

The Leapers UTG Super Slim RDM20 Mount – Glock Rear Sight Dovetail comes with essential installation hardware and tools. This typically includes the necessary screws to secure the mount to the pistol and potentially to the optic itself (though optic screws are usually supplied with the optic). This thoughtfully includes everything a user needs to get started without additional trips to the hardware store.

In terms of customization, the mount itself is not designed for modification. Its purpose is to provide a Docter/Noblex footprint interface. The true customization comes from the wide array of Docter/Noblex footprint micro red dot sights available on the market. This allows users to select an optic that perfectly matches their needs and budget, from basic reflex sights to more advanced models.

Compatibility with other brands is solely dictated by the Docter/Noblex footprint. This is a well-established standard, so users have a broad selection of optics to choose from. While the mount itself is fixed in its function, the optic it supports offers significant user choice.

Pros and Cons of Leapers UTG Super Slim RDM20 Mount – Glock Rear Sight Dovetail

Who Should Buy Leapers UTG Super Slim RDM20 Mount – Glock Rear Sight Dovetail?

This mount is an excellent choice for Glock owners who want to mount a Docter/Noblex footprint micro red dot sight without the expense and permanence of milling their slide. It’s ideal for range shooters, competitive handgunners looking for an accessible optic upgrade, or anyone who values a practical, secure solution for adding an optic. If you own a compatible Glock model and have a Docter/Noblex footprint red dot, this mount offers a straightforward path to integration.

However, serious competition shooters aiming for the absolute lowest possible sight profile, or those who absolutely require integrated suppressor-height backup sights, might need to consider slide-milling. This mount is best for users who understand the trade-offs involved in using a dovetail adapter versus a direct-mount system.

For those who choose this mount, I would strongly recommend ensuring you have the correct Docter/Noblex footprint red dot sight, as compatibility is key. Also, having a set of Glock front sights that are appropriately tall can help maintain a usable co-witness, depending on the specific optic used.

Conclusion on Leapers UTG Super Slim RDM20 Mount – Glock Rear Sight Dovetail

The Leapers UTG Super Slim RDM20 Mount – Glock Rear Sight Dovetail is a testament to effective, no-frills engineering. It delivers precisely what it promises: a secure, durable, and cost-effective way to mount a Docter/Noblex footprint micro red dot sight onto compatible Glock pistols. Its robust aluminum construction and matte finish speak to quality, and the simple installation process makes it accessible to a wide range of users.

At its price point, this mount offers exceptional value. While it doesn’t eliminate the inherent height increase that comes with not milling a slide, it does so with minimal bulk and a solid, reliable hold. It bridges a gap for shooters who want to explore red dot optics on their handguns without committing to permanent modifications.

I would confidently recommend this mount to any Glock owner looking for a practical and dependable solution for optic mounting. It’s a smart investment for enhancing handgun performance, proving that sometimes, the simplest designs are the most effective.