Trijicon RMR Mount for 3.5x, 4x, 5.5x ACOG Models (No Bosses)
The Trijicon RMR Mount for 3.5x, 4x, and 5.5x ACOG Models lets you stack a Trijicon RMR red dot on top of your ACOG without factory boss provisions. This co-witness setup is built for shooters who want the speed of a close-range red dot paired with the magnification and durability of an ACOG—a proven combination on duty rifles, patrol guns, and serious sport platforms. If your ACOG lacks integral bosses, this mount bridges that gap cleanly.
The no-bosses design means it's engineered for ACOGs that came without pre-drilled mounting provisions, giving you a way to add that RMR top-mount capability that many shooters demand. Whether you're running a 3.5x, 4x, or 5.5x magnification ACOG, this mount delivers the real estate you need. Trijicon's optics work because they're built for working guns—this accessory keeps that promise in mind.
This is the kind of accessory that separates a good setup from one that really hums. You get the bullet-drop compensation and bright, reliable reticle of an ACOG for longer work, and the low-light, fast-target RMR for close speed. Mount it once, zero it in, and stop second-guessing your glass.
Key Features
- Mounts Trijicon RMR to 3.5x, 4x, and 5.5x ACOG models
- Designed for ACOGs without factory boss provisions
- Enables co-witness red dot and magnified optic setup
- Trijicon engineering and durability standards
Specifications
| Optic Mount Compatibility | Trijicon RMR |
| Compatible ACOG Models | 3.5x, 4x, 5.5x magnification |
| Boss Type | No Bosses |
| Brand | Trijicon |
Frequently Asked Questions
Which ACOG magnifications does this mount fit?
This mount is compatible with Trijicon 3.5x, 4x, and 5.5x ACOG models, specifically those manufactured without factory boss provisions.
What red dot can I mount with this?
This mount is designed to accept the Trijicon RMR red dot sight.
My ACOG has bosses—will this mount work?
No. This mount is made for ACOGs without factory boss provisions. If your ACOG already has integral bosses, you may have other mounting options available.
Does this include the RMR sight?
This is the mount only. You'll need to purchase the Trijicon RMR separately.

