The EGW FN FNS and FNX Trijicon RMR sight mount gives you a clean, reversible way to add a red dot to your FN pistol without permanent modifications. This 7075 aluminum mount replaces your factory rear sight and accepts Trijicon RMR and Holosun HS507C optics — no gunsmithing, no drilling, and you can swap back to iron sights whenever you want. It's the kind of practical upgrade that makes sense whether you're running a competition gun, a carry piece, or a range toy.
Installation is straightforward: remove your rear sight, slide the mount into the dovetail, and secure it with the included 6-32 mounting hardware and set screw. The matte black hardcoat finish matches the rest of your gun, and the compact 1.78" length and 1.1" width keep the profile clean. EGW includes everything you need—just bring an allen wrench (5/64") and some blue Loctite to finish the job right.
This mount is engineered for the FN FNS and FNX platforms. If you run a Baby Desert Eagle (post-2006) or an EAA Witness Elite Match, this will work for you too. Rock Island 1911s are not compatible. The reversible design means you're not locked into optics forever; pull the mount, reinstall your rear sight, and you're back to irons.
Key Features
- Accepts Trijicon RMR and Holosun HS507C red dot sights
- 7075 aluminum construction with matte black hardcoat finish
- Replaces rear sight—no permanent modifications to your pistol
- Reversible: remove the mount and reinstall your factory rear sight anytime
- Compact footprint: 1.78" length, 1.1" width
- All mounting hardware included (2 flat head screws, 1 set screw)
- Works with FN FNS, FNX, Baby Desert Eagle (post-2006), and EAA Witness Elite Match
Specifications
| Material | 7075 Aluminum |
| Finish | Matte Black Hardcoat |
| Overall Length | 1.780" |
| Overall Width | 1.1" |
| Red Dot Compatibility | Trijicon RMR, Holosun HS507C |
| Pistol Compatibility | FN FNS, FN FNX, Baby Desert Eagle (post-2006), EAA Witness Elite Match |
| Mounting Hardware | 2x 6-32 flat head screws, 1x 6-32 x 3/16" set screw |
| Tool Required for Installation | 5/64" allen wrench |
Frequently Asked Questions
Will this mount fit my FN FNS or FNX pistol?
Yes, this mount is designed specifically for FN FNS and FNX platforms. It also fits Baby Desert Eagle (post-2006) and EAA Witness Elite Match pistols. It does not fit Rock Island 1911s.
What red dot sights are compatible with this mount?
The mount accepts Trijicon RMR and Holosun HS507C optics. The included mounting screws are sized for the Trijicon RMR.
Do I have to permanently modify my gun to install this mount?
No. The mount replaces your factory rear sight and installs into the existing dovetail. You can remove it anytime and reinstall your original rear sight without any permanent changes to your pistol.
What comes in the box?
The mount includes all mounting hardware: two 6-32 flat head screws, one 6-32 x 3/16" set screw, and installation instructions. You'll need to supply blue Loctite and a 5/64" allen wrench to complete installation.
