Apex Optic Mount for Holosun 509T Optic to Glock MOS Pistols

Description

The Apex Optic Mount provides a direct, secure fit for mounting the Holosun 509T to your Glock MOS pistol. If you are running a duty rig, competing, or building a serious carry setup, this mount eliminates the guesswork and potential failure points of adapter plates.

Machined from a single billet of steel and finished with a black oxide coating, this mount is built to handle hard use. It resists corrosion and wear, keeping your optic locked in place during high-round-count training sessions or in the field. This is a fixed, direct-mount solution designed exclusively for slides with the factory Glock MOS cut.

The mount replaces the factory MOS cover plate and provides a stable platform for the Holosun 509T. No additional adapters or modifications are needed. The included mounting screws are matched to the mount and the Glock MOS threads, saving you a trip to the hardware store.

Key benefits for your setup:

• Direct fit for Glock MOS: Works with all Glock models that have the factory Modular Optic System cut (G17 MOS, G19 MOS, G34 MOS, G45 MOS, etc.). No slide milling required.
• Steel construction: Billet steel is significantly stronger than aluminum or polymer options. This reduces flex and maintains zero under recoil, even with a suppressor-height front sight.
• Black oxide finish: Reduces glare and provides a matte, non-reflective surface. Holds up to holster wear and cleaning solvents better than anodized finishes.
• Secure mounting: The mount interfaces directly with the four recoil lugs in the MOS cut, preventing the optic from shifting under slide cycling or impact.
• Complete hardware included: All necessary screws are provided. No need to source additional fasteners or thread locker.

Fitment and installation notes:
The Apex Optic Mount is specifically for the Holosun 509T optic and Glock MOS slides. It mounts directly to the factory slide without any adapter plates. Before installation, clean the MOS pocket area thoroughly to remove any oil, debris, or old thread locker. Apply a small amount of blue thread locker to the included screws and torque them to 15 in-lb. This specification ensures the mount stays secure without over-stressing the screw threads.

This mount is a direct replacement for the factory cover plate. It adds minimal height over the slide, keeping your optic low enough to co-witness with standard-height sights in many cases. For competition shooters, the low profile improves draw speed and reduces snag points. For duty or defensive use, the steel construction provides the durability required for