Apex Optic Mount for HS 509T Footprint Optics to Glock Gen 6 Pistols

This optic mount is a precision-machined steel adapter designed to fit Holosun 509T footprint optics to GLOCK® Gen 6 Optic Ready slides. The primary problem it solves: factory Gen 6 slide cuts do not accept the 509T pattern directly, requiring a dedicated mount that maintains zero under repetitive slide acceleration. This component eliminates the need for slide milling or aftermarket plates by providing a direct, steel-to-steel interface between the optic and slide.

Compatibility

• GLOCK® Gen 6 Optic Ready slides (factory cut)
• Holosun HS 509T footprint optics (including 509T X2, 509T-GR, and 509ACSS)
• Does NOT fit Gen 5, Gen 4, or earlier slide cuts
• Does NOT fit MOS or other aftermarket slide cuts

Key Features

• Material: Billet steel (not aluminum) — rated for 3000g+ slide acceleration per shot. Prevents rail tear-out observed with 6061/7075 aluminum mounts during extended testing.
• Finish: Black PVD for corrosion resistance and reduced glare.
• Vibration Dampening: Silicone damper installed in the front cavity to close the light gap between the mount locking key and slide, reducing optic shift under recoil.
• Hardware: Two 4mm x 0.7 mounting screws with high-temp thread locker pre-applied. Torque spec: 15 in-lb.
• Origin: Machined and assembled in the Free State of Arizona.

Install Difficulty

Rating: 2 out of 5
Tools needed: Torque wrench (in-lb), #6 Torx bit, cleaning solvent, lint-free cloth.
Notes: Clean slide surface before installation. Apply thread locker to factory screws if reusing. No slide modification required. Typical install time: 10 minutes.

FAQ

Will this mount fit a Holosun 507C or 508T?

No. This mount is machined specifically for the Holosun 509T footprint (3-screw pattern with rear recoil lug). The 507C/508T use a different RMR footprint and will not align.

Why steel over aluminum for this application?

A 9mm slide generates approximately 3000g of acceleration per shot. In our testing, aluminum mounts (both 6061 and 7075) suffered rail tear-out after a few thousand rounds. Steel maintains structural integrity under that load indefinitely. For a slide-ride optic mount, reliability requires steel.

Can I use this mount on a Gen 5 GLOCK slide?

No. The Gen 6 optic cut uses a different locking key geometry and screw spacing than Gen 5. This mount is designed exclusively for Gen 6 factory slides.

Shipping: Ships within 1 business day via USPS Priority or UPS Ground. Warranty: This mount is covered by the manufacturer’s standard warranty against defects in material and workmanship. No lifetime guarantee — treat it as a precision component subject to proper installation and maintenance.