If you're rocking a Glock MOS (Modular Optic System), adding a Holosun red dot sight could be just the upgrade you need.
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Glock MOS Compatibility
Think of Glock MOS Modular Optic System allows you to snap on red dot sights with minimal fuss.

The package includes adapter plates tailored for different optic brands, including Holosun. This means you get an adaptable platform whether you're sporting a compact or full-sized Glock, or even flicking through various models.
Key Selling Points of Holosun Red Dot Sights
- Battery & Solar Life: With advanced LED tech offering up to 50,000 hours of battery life and some solar-powered models, these sights are about longevity.
- Side loading tray: No sight removal when swapping battery
- Tough as Nails: Built with IP67 waterproof certifications, these sights tough it out against the elements and kickback.
- Reticle Razzle-dazzle: The Multi-Reticle System lets you switch things up whether you're gunning with a 2 MOA dot, a 32 MOA circle, or both for a little customization flair.
Popular Models for Glock MOS
- Holosun 507C: Offers a 2 MOA dot and 32 MOA circle. It's flexible for almost any task.
- Holosun SCS MOS: Specifically crafted for Glock MOS, it fits the slide with no adapter needed—totally streamlined.
- Holosun 509T: Rocks an enclosed build to guard against debris and impacts.
Installation Guide
Step-by-Step Mounting Process
- Prep Your Pistol: Safety first—make sure it’s unloaded before removing the MOS cover plate.
- Select an Adapter Plate: Pick the right one for Holosun sights, but if you have the SCS MOS, skip the plate.
- Secure the Plate: Tighten up those screws with a hex wrench and apply some thread locker for extra security.
- Install the Holosun Sight: Make sure it's on straight and tight.
- Verify Fitment: Double-check everything’s secure and functioning well.
- Always use torque wrench to tighten between 10 to 12 inch pounds on each screw
- Glock pistols always have one screw longer one the left side than the right side.
Frequently Asked Questions
What Holosun model is best for my Glock MOS?
The Holosun SCS MOS is specifically designed for Glock MOS pistols, offering a streamlined fit without the need for adapter plates. However, models like the Holosun 507C and 509T are also popular choices depending on your preferences.
For 509T, you need an aftermarket adapter
Do I need an adapter plate to mount a Holosun sight on my Glock MOS?
Most Holosun sights will require the appropriate adapter plate that comes with your Glock MOS. However, the Holosun SCS MOS is designed to fit directly onto the slide without any adapter.
Are Holosun sights durable enough for heavy use?
Absolutely. Holosun sights are built with rugged materials and are rated IP67 waterproof for open emitter ones like the Holosun 507C. However, the durability is also depended on how tight the optic can be wedged inside the slide cutout so not all stress is exerted on the screws.