Forward Controls Design Sight Mount For Trijicon Rmr Fits Glock Mos

The Forward Controls Design Sight Mount for Trijicon RMR is a precision adapter plate built to maximize the potential of Glock's MOS (Modular Optics System) on Gen 4 and Gen 5 slides. Designed in collaboration with combat veterans and purpose-built to support Trijicon RMR and SRO optics, this steel adapter solves real problems with factory MOS plates: insufficient support for your optic, height inconsistency across different platforms, and mounting hardware that doesn't match the task. If you've run a pistol-mounted red dot on a Glock, you know the importance of a rock-solid mounting interface—this is it.

Where factory MOS plates rely on a standardized footprint that leaves your sight hanging a bit, FCD engineered a wider adapter plate that fully supports your RMR or SRO with recoil lugs and fences front and rear. The design eliminates the need for an additional sealer plate and ships with correctly sized, Torx-head fasteners: M3-0.5mm x 6mm screws for slide attachment and 6/32 x 3/8 screws for optic mounting. The plate itself is machined from steel and maintains the same thickness as Glock's OEM MOS plate, so your sight sits at the same height and your existing irons don't need adjustment. Everything you need to mount is included—screws, T10 Torx key, and a protective VC3 packet.

This adapter works across all MOS-equipped Glock slides with compatible footprints: the G17, G19, G34, G35, G41, and G40 (which requires Glock MOS Set 02). Made in the USA with the kind of attention to detail you expect when your optic sits on top of your carry gun or duty rig.

Key Features

• Full front and rear support for Trijicon RMR and SRO optics with recoil lugs and fences
• Wider adapter plate than factory MOS design for enhanced optic stability
• Eliminates the need for a separate sealer plate
• Steel construction, MOS-compatible thickness—no change to sight height or iron sight placement
• Torx-head fasteners for secure, repeatable mounting
• Ships with all necessary screws, T10 key, and protective VC3 packet
• Designed and made in the USA

Specifications

Frequently Asked Questions

What Glock models does this adapter fit?

The Forward Controls Design RMR mount works on Gen 4 and Gen 5 MOS-equipped Glocks: G17, G19, G34, G35, G41, and G40. The G40 requires a Glock MOS Set 02 footprint. If you're unsure whether your slide is MOS-compatible, check your slide for the MOS marking or consult your Glock documentation.

Can I use this mount with optics other than Trijicon RMR?

This adapter is designed specifically for Trijicon RMR and SRO optics. Do not use it with other footprints or optic types, as proper mounting support and safety cannot be guaranteed.

What fasteners are included, and do I need to buy anything else?

Everything needed for installation is included: plate-to-slide screws (M3-0.5mm x 6mm), sight-to-plate screws (6/32 x 3/8), and a T10 Torx key. You don't need to purchase additional hardware. A VC3 protective packet is also included.

Will mounting this adapter change my sight height or require new iron sights?

No. The adapter plate is the same thickness as the factory Glock MOS plate, so your mounted sight height remains unchanged and your existing iron sights do not need replacement.