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How to mount a Viridian RFX-25 on a Weaver base: it is a Docter / Noblex open-emitter reflex, so it needs a Weaver-compatible Docter / Noblex mount, not a Picatinny one.

Updated 05 September 2026.

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Fit a Viridian RFX-25 on a Weaver base

The Viridian RFX-25 is a Docter / Noblex optic. Here is the Weaver-compatible mount it needs and why a Picatinny footprint mount may not seat on a Weaver slot.

Direct fitThe Viridian RFX-25 reaches a Weaver base through a Weaver-compatible Docter/Noblex-footprint Picatinny mount. A Picatinny version of the same footprint mount may not seat, because its 5.23 mm recoil lug can be too wide for the 4.57 mm Weaver slot. Buy the Weaver-cut mount, or fit a Picatinny base first.
OpticViridian RFX-25Docter / Noblex
seats on
RailWeaver rail4.57 mm slot, narrower than Picatinny
Fit readoutBench figures
Fitment
Optic type
open-emitter reflex
Mount
Weaver-compatible Docter / Noblex mount
Mount the Viridian RFX-25 on Weaver
Shop Weaver-compatible Docter / Noblex mount on AmazonaffiliateFind Weaver-compatible Docter / Noblex mount on eBayaffiliateShop Weaver to Picatinny adapter base on AmazonaffiliateFind Weaver to Picatinny adapter base on eBayaffiliate

The Viridian RFX-25 is a Docter / Noblex optic, so it needs a Docter / Noblex mount. On a Weaver base that mount has to be a Weaver-compatible version: Weaver slots are narrower and spaced differently from Picatinny, so a full-width Picatinny recoil lug may not drop in.

If the only Docter / Noblex mount you can find is Picatinny-cut, the cleaner fix is to replace the Weaver base with a Picatinny rail, then use the standard Docter / Noblex Picatinny mount. Check the mount clamps square before locking it down.

Related fitments

Questions and answers

Fit a Viridian RFX-25 on a Weaver base?

The Viridian RFX-25 reaches a Weaver base through a Weaver-compatible Docter/Noblex-footprint Picatinny mount. A Picatinny version of the same footprint mount may not seat, because its 5.23 mm recoil lug can be too wide for the 4.57 mm Weaver slot. Buy the Weaver-cut mount, or fit a Picatinny base first.