What Holosun Fits Glock 43X Mos – Compatibility Guide
For your Glock 43X MOS, go for Holosun models with a Shield RMSc footprint. Think about options like the 507K X2, 407K X2, or EPS Carry. These are designed for direct compatibility, so you won’t need to do any modifications.
Larger models like the 507C or 509T won’t fit properly on a Glock 43X MOS. They usually require adapter plates and some custom milling to get them mounted correctly.
When installing your sight, make sure to use the proper torque and threadlocker. It’s also a good idea to verify co-witness with your suppressor-height sights. This ensures reliable performance and helps you avoid common pitfalls.
Which Holosun Red Dots Are Fully Compatible With Glock 43X MOS?
When mounting a Holosun red dot on your Glock 43X MOS, you’ll find that the 507K X2, 407K X2, and EPS Carry models are fully compatible without needing any modifications.
These Holosun optics use the Shield RMSc footprint, which matches the Glock 43X MOS’s proprietary Slim MOS plates.
Holosun optics feature the Shield RMSc footprint, perfectly aligning with the Glock 43X MOS Slim MOS plates.
This ensures a direct, secure fit on the slide and keeps the pistol’s slim profile intact.
The RMSc footprint is key for compatibility because it allows these micro red dots to mount flush without overhang or the need for adapters.
Using these models guarantees ideal sight alignment and co-witness potential.
Just a heads up—full-size Holosun models aren’t compatible due to their larger footprints and dimensions.
Why Some Holosun Models Don’t Fit Glock 43X MOS
Although Holosun offers a wide range of red dot sights, not all models will fit the Glock 43X MOS. This is mainly because of differences in footprint and slide dimensions.
Full-size Holosun models like the 507C and 509T tend to be too big for the slim 43X MOS slide. This causes overhang and can make holster fit tricky.
The 507C X2, on the other hand, uses a Trijicon RMR footprint, which doesn’t match the Glock MOS pattern. That means you’ll need an adapter or custom milling to get it installed properly.
Many larger Holosun optics aren’t designed for such a compact slide profile either. Factory Glock plates and iron sights sit too low to co-witness with these larger models.
Only optics with the Shield RMSc footprint are directly compatible. Full-size or bigger Holosun sights don’t match the proprietary MOS slide cut of the Glock 43X MOS, so compatibility can be a challenge.
Do You Need an Adapter Plate for Glock 43X MOS?
If you’re planning to add a Holosun optic to your Glock 43X MOS, you’ll generally need an adapter plate. The only exception is if you’re using a Holosun with the Shield RMSc footprint—then, you mightn’t need one.
When you compare factory plates to aftermarket ones, you’ll notice that aftermarket options often give a more secure fit and sit a little lower, which can be a big plus.
Just make sure you install the right plate properly—that’s key to keeping your zero intact and avoiding any damage to your optic or slide.
Adapter Plate Necessity
Since the Glock 43X MOS has a compact slide, mounting larger or full-size Holosun optics usually means you’ll need an adapter plate.
The factory Glock plate is often made from softer metal, which can deform over time. This can compromise durability and make it harder to keep the optics securely mounted.
If you’re using full-size Glock MOS footprint optics or want the ideal co-witness height, an adapter plate is essential.
Here’s what you should know:
- Micro optics like the Holosun 407K can be mounted directly without an adapter plate because they’ve a Shield RMSc footprint.
- There are aftermarket adapter plates from brands like AltitudeCraft that improve fit and durability. They also help lower the optic height for better alignment.
- Using a proper adapter plate prevents slide damage and ensures the optic lines up precisely. This leads to a more consistent sight picture.
In short, if you’re mounting full-size Holosun optics, an adapter plate isn’t just optional—it’s a must for reliable performance.
Plate Types Comparison
When choosing the right plate for your Glock 43X MOS, it’s important to understand the differences between factory and aftermarket adapter plates.
The Glock 43X MOS has a proprietary Slim MOS footprint, which means you’ll need specific MOS adapter plates for most optics.
Factory plates are often made from softer metals, which can risk deformation over time. This can compromise the mounting integrity of your optic.
Aftermarket adapter plates from brands like AltitudeCraft or CHPWS tend to be more durable and have a lower profile. They ensure a precise fit and secure mounting for your optic.
Some optics, like the Holosun 407K or 507K with the Shield RMSc footprint, can be mounted directly if your slide is milled for it. This eliminates the need for an adapter plate altogether.
Choosing the right adapter plate helps keep everything aligned and ensures your optic stays secure. It also helps maintain zero retention, so your sights stay on target.
Getting this right is key to getting the best performance from your setup.
Installation And Fit
Although some Holosun models with a Shield RMSc footprint can mount directly to the Glock 43X MOS slide, most Holosun optics need an aftermarket adapter plate for proper installation.
The factory Glock MOS plates are often too tall and can deform easily, which affects the fit and reliability of your optic. It’s better to use a quality adapter plate, like those from AltitudeCraft, to ensure a secure mount.
Installing your optic involves three key steps. First, attach the adapter plate firmly to the slide using screws.
Next, mount the Holosun optic onto the adapter plate.
Finally, torque all screws with threadlocker to guarantee a stable, lasting fit. This precise process prevents shifting and damage, helping your optic stay perfectly aligned even during rigorous use.
How to Properly Mount a Holosun on Your Glock 43X MOS
Before mounting your Holosun on the Glock 43X MOS, make sure to remove the factory cover plate and verify that the slide is clear.
Remove the factory cover plate and ensure the slide is clear before mounting your Holosun on the Glock 43X MOS.
Use the correct adapter plate designed specifically for the Glock 43X MOS. This ensures a secure and precise mount.
Position the adapter plate properly, then align your Holosun optic on top.
Apply blue Loctite 242 to the mounting screws to prevent them from loosening over time.
Using a Torx driver, tighten the screws to a torque of 10–15 inch-pounds.
Be careful not to over-tighten, as this can damage the slide or the optic.
After mounting, perform a zeroing procedure at 15–25 yards.
This helps confirm that your point of impact is accurate.
Following these steps will help ensure your Holosun fits securely and works reliably on your Glock 43X MOS.
Can You Co-Witness Iron Sights With Holosun on Glock 43X MOS?
You can’t really co-witness the iron sights with the Glock 43X MOS’s factory sights because they’re just too low for the Holosun optic.
If you want a proper lower third co-witness, you’ll need to swap in some suppressor-height sights that line up better with the Holosun’s window.
That way, your iron sights and the optic sit at the right height relative to each other, making co-witnessing much more reliable and practical.
Suppressor-Height Sight Necessity
Since the factory iron sights on the Glock 43X MOS sit too low, you’ll need suppressor-height sights to co-witness effectively with your Holosun optic. Standard sights just won’t line up with the optic’s window, making backup sighting pretty much impossible.
Suppressor-height sights elevate both the front and rear sights to match the plane of the optic. This guarantees that your iron sights will align perfectly with the Holosun, ensuring seamless co-witnessing.
Here’s why switching to suppressor-height sights is a smart move. First, it helps you achieve either absolute or 1/3 co-witness for reliable sight alignment.
Second, it keeps your target acquisition quick and smooth, whether you’re using the iron sights or the optic.
Plus, if your Holosun optic ever fails, you’ll still have a functional backup sighting method. Installing suppressor-height sights is essential for tactical readiness and optimal performance on your Glock 43X MOS.
Lower Third Co-Witness
Although co-witnessing iron sights with a Holosun optic on the Glock 43X MOS can be tricky, it’s definitely possible with the right setup.
The factory iron sights sit too low to line up with most micro optics, so you’ll need suppressor-height sights. These taller sights raise the sight plane, which helps your iron sights show up along the lower third of the optic’s window.
This setup gives you a clear co-witness line without blocking the reticle of your micro optic. Keep in mind, the exact co-witness will depend on the Holosun model you’re using and the height of your sights.
When everything is installed correctly, you’ll get a reliable lower third co-witness. It makes target acquisition quicker and more intuitive on your Glock 43X MOS.
Common Mounting Mistakes to Avoid With Holosun and Glock 43X MOS
When mounting a Holosun optic on your Glock 43X MOS, it’s really important to install it properly to keep everything reliable and accurate.
One common mistake is using the wrong adapter plate. Never fit a full-size MOS plate on your slim 43X slide. This causes overhang and a poor fit, which can compromise stability.
Another mistake is over-tightening the screws. Don’t go beyond 10-15 in-lbs of torque. Overdoing it risks cracking the lens or damaging the mounting plate.
Also, don’t forget to apply blue Loctite 242 on the screws. Without it, recoil and vibration can loosen your optic over time, messing up your alignment and shot precision.
Always make sure your mount is level to keep perfect alignment. It’s also a good idea to verify iron sight co-witness to ensure an unobstructed sight picture with your Holosun optic.
Best Holosun Models for Glock 43X MOS
Proper mounting sets the foundation, but choosing the right Holosun model for your Glock 43X MOS is key to getting the best performance and fit.
The Holosun 507K X2 and 407K X2 both feature the Shield RMSc footprint, so they fit directly onto the Glock 43X MOS slide without any modifications.
The 507K X2 stands out with its multi-reticle system and an impressive 50,000-hour battery life, making it reliable even in demanding situations.
If you’re on a budget, the 407K X2 offers a crisp 6 MOA dot and solid overall performance.
The Holosun EPS Carry is also a great option. It’s designed with an enclosed emitter for debris protection and matches the Glock 43X MOS’s proprietary Slim MOS pattern perfectly.
Avoid full-size Holosun models like the 507C or 509T. They require custom milling and don’t align well with the 43X MOS’s red dot sights setup.
Frequently Asked Questions
What Maintenance Is Required for Holosun Optics on Glock 43X MOS?
You should perform regular optics cleaning using a soft, lint-free cloth to keep your Holosun optic clear.
It’s also important to keep an eye on the battery life and replace the battery when needed to ensure the illumination stays consistent.
Make sure to routinely check the sight calibration and adjust it as necessary to maintain accuracy.
Don’t forget to tighten the mounting screws periodically, and consider using threadlocker during installation to prevent shifting under recoil.
Lastly, try to avoid exposing your optic to extreme impacts or temperatures, as this can damage internal components and affect performance.
How Long Do Holosun Batteries Typically Last in Glock 43X MOS Models?
You can expect Holosun battery life on Glock 43X MOS models to exceed 50,000 hours with proper power management.
Using features like auto-brightness and energy-efficient reticles can really help extend the runtime.
Shake Awake technology activates the sight only when it’s in use, which conserves power and helps your batteries last longer.
Most models use replaceable batteries, so you can easily swap them out when needed.
However, the EPS Carry model has a rechargeable option that lasts up to 20,000 hours per charge.
To get the most out of your sight, it’s a good idea to adjust the settings wisely and use the power-saving features.
Are Holosun Red Dots Waterproof for Glock 43X MOS Use?
Yes, Holosun red dots often meet IP67 or higher waterproof ratings. This means they can handle being submerged in water up to 1 meter for 30 minutes.
Their rugged construction and advanced sealing mechanisms help prevent water and dust from getting inside. So, they’re pretty durable and weather-resistant, making them suitable for Glock 43X MOS use.
That said, it’s always a good idea to check the specific rating of each model. Not all Holosun sights guarantee the same level of waterproof protection.
Can Holosun Optics Withstand Recoil From Glock 43X MOS?
Yes, Holosun optics can withstand the recoil from the Glock 43X MOS. Their lens durability and enclosed emitter design help minimize damage from recoil impact.
When you mount your optic using the proper torque settings, typically around 10-15 in-lbs, and apply threadlocker, you help ensure the optic stays in place. This way, you can maintain a reliable zero even after repeated recoil.
Holosun’s Shield RMSc footprint models are designed specifically for micro pistols like the Glock 43X MOS. They offer a secure mounting option that keeps zero intact during heavy use.
What Warranty Does Holosun Offer for Glock 43X Mos-Compatible Models?
Oh sure, Holosun’s warranty won’t cover if you decide to test its lens clarity by throwing it off a cliff. But for genuine defects, you’re covered for three years.
You get peace of mind on those crisp optical coatings, reliable brightness settings, and secure mounting options.
Just register your optic, keep your proof of purchase, and you’ll have free repairs or replacements if things go sideways within the warranty period.
Conclusion
If you thought choosing a Holosun for your Glock 43X MOS was tricky, it’s actually about matching compatibility and mounting precision.
The right Holosun model fits seamlessly without needing any adapters. This means you can co-witness iron sights flawlessly, which is a big plus.
Avoid common mounting errors, and you’ll get the most out of your setup. It’s all about maximizing performance and reliability.
With this guide, you’re not just fitting a red dot—you’re optimizing your Glock’s potential with technical accuracy and confidence.
