OSA Glock 43X/48 MOS Conversion – Trijicon RMRcc

Convert your Glock 43X MOS or Glock 48 MOS into a true direct-mount platform for the Trijicon RMRcc. By modifying the factory MOS footprint, the optic mounts directly to your slide without the need for an adapter plate, resulting in a lower-mounted optic, improved durability, and a stronger mounting interface.

Designed specifically for concealed carry, this conversion provides a cleaner installation and more natural sight picture while maintaining the legendary reliability of the Trijicon RMRcc.

Compatible Optic

Trijicon RMRcc

Service Includes

Precision modification of your Glock 43X/48 MOS slide
Factory indexing posts removed and footprint modified for direct RMRcc mounting
Complete slide disassembly and reassembly
Iron sight installation (some limitations apply)
Two sets of 5-40 x 5/16" mounting screws (3/32" hex drive)
Choice of finish:
- Optic Cut Only (Cold Blue)
- Single Color Cerakote
- Camo Pattern Cerakote

Why Direct Mount?

While adapter plates make mounting different optics convenient, they also increase optic height, add another failure point, and reduce screw engagement.

Our direct-mount conversion allows the Trijicon RMRcc to sit lower in the slide, providing:

Improved presentation and faster dot acquisition
Increased screw engagement
A stronger mounting interface
Better overall durability
A cleaner, factory-like appearance

For an everyday carry pistol, these advantages are well worth the conversion.

Iron Sight Compatibility

Recommended backup sights:

Lower 1/3 Co-Witness

AmeriGlo (.280" Front / .355" Rear)

Our Thoughts

The Trijicon RMRcc is one of the premier enclosed-duty style optics designed specifically for slim concealed carry pistols.

Its compact footprint, exceptional durability, and long battery life make it an outstanding choice for shooters who want Trijicon reliability on their Glock 43X or 48.

Rather than stacking the optic on top of an adapter plate, this conversion creates a direct interface between the slide and optic, producing a lower, stronger installation that's better suited for everyday carry.

The result is a pistol that presents more naturally, co-witnesses more effectively with backup irons, and maintains zero under hard use.

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 Glock slide machining specialists, to perform 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 exceptional strength, repeatability, and long-term reliability.