How to mount a EOTech MRDS 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.

Scope Mount Finder / Every rail, tube and red-dot footprint

Fit a EOTech MRDS on a Weaver base

Name: Fit a EOTech MRDS on a Weaver base: published specification
Creator: Scope Mount Finder
License: https://creativecommons.org/licenses/by/4.0/

The EOTech MRDS 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 EOTech MRDS 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.

OpticEOTech MRDSDocter / 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 EOTech MRDS on Weaver

Shop Weaver-compatible Docter / Noblex mount on Amazonaffiliate Find Weaver-compatible Docter / Noblex mount on eBayaffiliate Shop Weaver to Picatinny adapter base on Amazonaffiliate Find Weaver to Picatinny adapter base on eBayaffiliate

The EOTech MRDS 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

›EOTech MRDS on a Picatinny railthe Picatinny case
›EOTech MRDS footprint and mountthe optic
›Weaver railthe base
›Picatinny mount on a Weaver railwhy the lug matters

Questions and answers

Fit a EOTech MRDS on a Weaver base?

The EOTech MRDS 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.