OSA Glock Optic Cut – Trijicon RMR
The OSA Trijicon RMR Optic Cut is designed for shooters who want the strongest, most reliable way to mount a Trijicon RMR to their Glock. By machining the optic directly into your factory slide, the RMR sits significantly lower than factory MOS plates or dovetail adapters, creating a more durable mounting solution with a faster, more natural presentation.
Trusted by military personnel, law enforcement officers, competitive shooters, and concealed carriers alike, the Trijicon RMR remains one of the most proven pistol optics ever produced—and a direct-milled slide is the best way to mount it.
Note: This optic cut is not compatible with the Trijicon RCR or Holosun adapter plates.
Compatible Optics
- Trijicon RMR Type 1
- Trijicon RMR Type 2
Also Compatible With:
- Holosun 507C*
- Holosun 407C*
- Holosun 508T*
Holosun optics require shorter mounting screws. Recommended iron sight heights differ due to the larger optic window. Please refer to our Holosun 507C/407C/508T Optic Cut page for those recommendations.
Service Includes
- Precision Trijicon RMR optic cut
- 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 3/8" T10 Torx mounting screws
- Precision-machined front indexing posts and integral recoil bosses
- Choice of finish:
- Optic Cut Only (Cold Blue)
- Single Color Cerakote
- Camo Pattern Cerakote
Precision Machining
The slide is machined to a depth of 0.150", allowing the optic to sit lower than adapter plate systems while maximizing screw engagement and creating an exceptionally strong mounting interface.
This cut incorporates front indexing posts and integral recoil bosses surrounding the mounting screws. These precision-machined features absorb recoil forces, reduce stress on the mounting hardware, and help maintain zero through thousands of rounds and repeated optic removal.
The result is a cleaner, stronger, and more reliable mounting solution than plate-based systems.
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 3XL (.365" Front / .451" Rear)
Our Thoughts
The Trijicon RMR set the standard for pistol-mounted red dots.
Years after its introduction, it remains one of the toughest and most trusted optics available. Its reputation for reliability has made it the preferred choice for military units, law enforcement agencies, and countless concealed carriers.
A quality optic deserves a quality mounting solution.
By machining the slide specifically for the RMR footprint, we eliminate unnecessary adapter plates, allowing the optic to sit lower, improving presentation, increasing screw engagement, and creating a significantly stronger interface with the slide.
As an added benefit, this optic cut is also compatible with the Holosun 507C, 407C, and 508T (using the appropriate mounting screws), giving you additional flexibility should you ever decide to switch optics.
Every refinished slide also receives a new striker channel liner during reassembly—one of the many small details we include to ensure your slide is returned ready for years of dependable 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 premier Glock slide machining specialists, for 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-leading mounting interface engineered for maximum strength, repeatability, and long-term reliability.
