Viridian RFX 45 RMR Mounting Adapter Black

If you're running a red dot on an RMR or ACRO footprint, this adapter solves the bridge problem between your optic and existing rail real estate. The Viridian RFX 45 gives you solid mechanical mounting without the guesswork. Whether you're setting up at our San Ramon location or handling an FFL transfer in Sunnyvale, precision mounting hardware keeps your zero stable.

RMR footprint compatibility and mounting interface

This adapter plate accepts RMR and ACRO pattern optics, giving you flexibility when you're standardizing your dot platform. The machined design handles recoil without play, and the low-profile footprint doesn't add unnecessary bulk. Shooters working with handguns, PCCs, and compact rifles benefit from having one standardized mounting solution. For those building configurations around PC §32100 exempt revolvers, optic mounting options remain limited—but this adapter expands what you can do with modern red dot systems. Browse our gun store.

Frequently asked questions

What firearm platforms does this RMR adapter work with?

The RFX 45 accepts any slide, receiver, or rail system with RMR or ACRO pattern milling. Pistols, PCCs, and rifle uppers all use the same footprint. Verify your specific platform has the correct mounting surface before ordering.

Does this adapter require Loctite or special installation tools?

Standard T15 or T20 torx driver handles installation. Threadlocker on the screws is recommended for secure mounting. Refer to Viridian's documentation for exact torque specs to avoid damaging the adapter.

How long is the California firearm waiting period?

California requires a 10-day waiting period from when DROS is submitted until you can take possession of the firearm. Find gun store Richmond at TacticCAL.