The Trijicon RM66 lets you piggyback an RMR or SRO red dot on top of an ACOG (models with mounting bosses) — adding a fast close-range optic above your magnified primary. Durable aluminium construction for a secure, repeatable fit.
How It Compares
Different ACOG boss pattern? See the RM35. Mounting on a rail instead? The RM34. Browse all optic mounts, the Trijicon range, and ACOG scopes.
Ideal For
- ACOG users wanting a piggyback red dot
- RMR/SRO close-range backup
- Dual-optic rifle setups
Key Features
- Piggyback RMR/SRO mount for ACOG (with bosses)
- Durable aluminium; secure fit
Technical Specifications
| Fits |
Trijicon RMR / SRO on ACOG (bosses) |
| Material |
Aluminium |
| MPN |
AC32029 |
What's Included
- Trijicon RM66 mount, mounting hardware
UK Delivery & Support
UK-stocked and dispatched tracked from our UK warehouse — no import duties or customs delays — backed by UK-based support and Trijicon's warranty.
Frequently Asked Questions
What does it do?
It mounts an RMR or SRO above an ACOG that has mounting bosses, for a magnified + red-dot combo.
RM66 or RM35?
Both are ACOG-boss RMR mounts for different ACOG models — match to your ACOG.
Which optics fit on top?
Trijicon RMR and SRO (RMR footprint).