OSA Glock Optic Cut - Holosun 509T

OSA Glock Optic Cut – Holosun 507C / 507 COMP / 407C / 508T

Upgrade your Glock with a precision direct-milled optic cut designed for the Holosun 507C, 507 COMP, 407C, and 508T optics. By machining the optic directly into your slide, your red dot sits significantly lower than factory MOS plates or dovetail adapters, resulting in a stronger mounting interface, improved presentation, and a more natural sight picture.

Whether you're building a competition pistol, defensive handgun, or duty gun, a direct optic cut provides the durability and repeatability serious shooters expect.

Note: This optic cut is not compatible with the Holosun HE509-RD ACSS.

Compatible Optics

• Holosun 507C
• Holosun 507 COMP
• Holosun 407C
• Holosun 508T

Service Includes

• Precision optic cut for the Holosun C-Series footprint
• Complete slide disassembly and reassembly
• Iron sight installation (some limitations apply)
• New striker channel liner installed on refinished slides
• Machined recoil/indexing bosses for improved optic retention
• (2) Threaded 4-40 holes for optional cover plate installation
• Choice of finish:
  • Optic Cut Only (Cold Blue)
  • Single Color Cerakote
  • Camo Pattern Cerakote

Precision Machining

Your optic is machined to a depth of 0.175", allowing it to sit lower than adapter plate systems while maximizing screw engagement and maintaining a robust mounting surface.

Integrated recoil bosses help absorb recoil forces instead of placing all the stress on the mounting screws, resulting in improved durability and excellent return-to-zero characteristics after optic removal and reinstallation.

Two threaded 4-40 holes are also machined into the slide, allowing the installation of an optional cover plate should you ever choose to remove your optic.

Iron Sight Compatibility

Recommended AmeriGlo sight heights:

Lower 1/3 Co-Witness

• AmeriGlo 1XL (.315" Front / .394" Rear)
• AmeriGlo 2XL (.350" Front / .429" Rear)

Absolute Co-Witness

• AmeriGlo 5XL (.407" Front / .451" Rear)

Our Thoughts

The Holosun C-Series footprint has become one of the most popular optic footprints available, and for good reason.

From the proven 507C to the large-window 507 COMP and rugged 508T, these optics offer exceptional durability, long battery life, and outstanding value.

Rather than stacking an optic on top of an adapter plate, we believe a direct-milled slide is the best way to mount a pistol optic. It lowers the optic into the slide, improves presentation, increases screw engagement, and creates a much stronger mounting interface.

Every refinished slide also receives a new striker channel liner during reassembly—one of the many small details that helps ensure your slide is returned ready for years of reliable service.

Turnaround & Shipping

• Current Lead Time: Approximately 2–3 Weeks
• Please include a copy of your order invoice when shipping or dropping off your slide.

Professional Machining

OSA partners with Battle Werx, one of the industry's most respected slide machining specialists, to perform all optic milling services. Every slide is professionally machined, inspected, refinished (if selected), and returned ready for hard use.

Patent Information

This service incorporates patented optic cut technology pioneered by ZEV Technologies (U.S. Patent RE47335), providing an industry-proven mounting interface designed for exceptional strength, repeatability, and long-term reliability.