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Description
A steel optic plate that mounts a Trijicon RMR, RMR HD, SRO or RCR on Glock MOS slides, in 17-4 stainless steel for salt-water and high-humidity use.
The OPF-G, RMR replaces the factory Glock MOS adapter plate. Front and rear fences hold the sight still under recoil, so the sight-to-plate screws no longer carry the recoil load that loosens or shears them on the factory plate.
The plate supports the full width of the sight, so no separate sealing plate is needed, and it is the same thickness as the Glock MOS plate — sight height and iron sight choice stay unchanged. This version is machined from 17-4 stainless steel with a black nitride finish.
Key features
- Front and rear fences — The sight is cradled between two recoil fences, keeping it static relative to the mounting screws.
- Full-width support — The plate supports the whole base of the RMR and SRO, so a sealing plate is not necessary.
- Factory sight height — Thickness matches the Glock MOS plate; it does not change mounted sight height or require different iron sights.
- 17-4 stainless steel — Black nitride treated stainless steel, offered by Forward Controls Design for salt-water divers and high-humidity environments.
- Torx hardware — Supplied with correct-length Torx plate-to-slide and sight-to-plate screws.
Compatibility and fitment
- For Glock Gen 3 to Gen 5 MOS slides only. Not compatible with Glock Gen 6 (ORS) slides — for those use the OPF-G6, RMR plate.
- Fits standard Glock MOS slides only. It does not fit the law-enforcement-only MOS3 (DPP), MOS5 (RMR), MOS6 (Holosun 509T) or MOS7 (ACRO) slides.
- Slides: Glock MOS Adapter Set 01 and Set 02 compatible — factory MOS G17, G19, G20, G21, G22, G23, G26, G34, G35, G40, G41, G45, G47 and G49 (Gen 4, Gen 5 and the Gen 3 CA MOS).
- Sights: Trijicon RMR, RMR HD, SRO and RCR.
- Not a drop-in part: because of the ±0.005 in tolerance of the RMR and SRO, the plate may need fitting before the sight seats fully. A competent gunsmith can do this.
- Use only 3/8 in long 6-32 sight screws. Do not use longer 1/2 in screws.
- Holosun: fit is not guaranteed. Forward Controls Design does not recommend the Holosun 508T on this plate, and it does not work with the Holosun 509T's RMR adapter plate. If a Holosun sight is used, use the short screws supplied with that sight — never the screws supplied with this plate (Holosun uses a 90° countersink, the RMR and SRO 82°), or the plate may be damaged.
- The plate and the RMR are wider than the G17, G19, G34, G45 and G47 slides and overhang slightly on both sides. On the wider 1.08 in and 1.12 in slides there is no overhang, but the plate's front corners do not follow the slide contour; this is cosmetic.
- A torque wrench graduated in in·lb is needed to tighten the screws to the stated values.
Technical specifications
| Material | 17-4 stainless steel |
| Finish | Black nitride |
| Weight | 0.86 oz (24 g) |
| Plate-to-slide torque | 13 in·lb (1.5 N·m) |
| Sight-to-plate torque | 13 in·lb (1.5 N·m) |
| Country of manufacture | USA |
In the box
- 1 × OPF-G, RMR plate
- Plate-to-slide screws, M3-0.5 × 6 mm
- 4 × sight-to-plate screws, 6-32 × 3/8 in (for Trijicon RMR and SRO only)
- 1 × packet of Vibra-Tite VC-3 threadlocker
Model information
| Brand | Forward Controls Design |
| Model | OPF-G, RMR — Glock MOS plate for Trijicon RMR / RMR HD / SRO / RCR, 17-4 stainless steel, black nitride |
| MPN | OPF-G, RMR 17-4 SS |