OSA Glock Optic Cut – Holosun 507C / 507 COMP / 407C / 508T
Upgrade your Glock with a precision direct-milled optic cut designed specifically for the Holosun 507C, 507 COMP, 407C, and 508T. By machining the optic directly into your factory slide, your red dot sits significantly lower than factory MOS plates or dovetail adapters, creating a stronger mounting interface, improved durability, and a more natural sight picture.
Whether you're building a competition pistol, defensive carry gun, or duty handgun, a direct optic cut provides the strength and repeatability serious shooters demand.
Note: This optic cut is not compatible with the Trijicon RCR or Holosun adapter plates.
Compatible Optics
- Holosun 507C (V1, V2 & X2)
- Holosun 507 COMP
- Holosun 407C (V1, V2 & X2)
- 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 all refinished slides
- Two pairs of 4-40 x 5/16" T10 Torx mounting screws
- Precision-machined recoil/indexing posts
- Choice of finish:
- Optic Cut Only (Cold Blue)
- Single Color Cerakote
- Camo Pattern Cerakote
Precision Machining
Your slide is machined to a depth of 0.150", allowing the optic to sit lower than plate-mounted systems while maximizing screw engagement and creating an exceptionally secure mounting interface.
This cut incorporates front indexing posts along with integral recoil bosses surrounding the mounting screws. These precision-machined features absorb recoil forces and help maintain zero even after repeated optic removal and installation.
The result is a stronger, more reliable mounting solution built for hard use.
Iron Sight Compatibility
Recommended AmeriGlo sight heights:
Lower 1/4 Co-Witness
- AmeriGlo (.260" Front / .355" Rear)
Lower 1/3 Co-Witness
- AmeriGlo 1XL (.315" Front / .394" Rear)
Absolute Co-Witness
- AmeriGlo 5XL (.407" Front / .451" Rear)
Our Thoughts
The Holosun 507C footprint has become one of the most popular pistol optic mounting standards available today—and for good reason.
Whether you choose the proven 507C, the competition-focused 507 COMP, the rugged 508T, or the value-packed 407C, all benefit tremendously from a proper direct-milled installation.
By eliminating adapter plates, the optic sits lower in the slide, improving presentation, increasing mounting strength, and creating a cleaner overall package.
The 507 COMP has become one of our favorite optics for USPSA and range use thanks to its massive window, while the 507C and 508T continue to be excellent choices for concealed carry and duty applications.
Every refinished slide also receives a new striker channel liner during reassembly. It's one of those small details that's easy to overlook but helps ensure your slide is returned in top working condition.
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 leading Glock slide machining specialists, for all optic milling services. Every slide is professionally machined, inspected, refinished (if selected), and returned ready for years of dependable service.
Patent Information
This service incorporates patented optic cut technology pioneered by ZEV Technologies (U.S. Patent RE47335), providing an industry-proven mounting interface engineered for maximum strength, repeatability, and long-term reliability.
