Does a Docter / Noblex-footprint red dot fit a Trijicon RMR slide cut? Fits only with an adapter plate. Why, and the plate or optic to use instead.

Updated 05 September 2026.

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

Will a Docter / Noblex optic fit a Trijicon RMR slide cut?

Name: Will a Docter / Noblex optic fit a Trijicon RMR slide cut?: published specification
Creator: Scope Mount Finder
License: https://creativecommons.org/licenses/by/4.0/

A Docter / Noblex-cut optic on a Trijicon RMR slide: whether it fits, why, and what to buy so the dot seats square.

Needs adapterA Docter / Noblex-footprint optic fits only with an adapter plate a Trijicon RMR slide cut. The Docter/Noblex and RMR are different footprints, so a Docter-cut optic does not screw directly to an RMR slide. Use a Docter-to-RMR adapter plate, where the added height suits the slide.

Fit readoutBench figures

Fitment

Optic footprint

Docter / Noblex

Slide cut

Trijicon RMR

Result

adapter plate needed

What to use

a Docter-to-RMR adapter plate, where the added height suits the slide

What to fit it with

Shop Trijicon RMR red dot mounting plate on Amazonaffiliate Find Trijicon RMR red dot mounting plate on eBayaffiliate Shop Docter / Noblex red dot mounting plate on Amazonaffiliate Find Docter / Noblex red dot mounting plate on eBayaffiliate

This is the pistol-slide question: your optic is cut for the Docter / Noblex footprint, and the slide in front of you is milled for the Trijicon RMR pattern. The Docter/Noblex and RMR are different footprints, so a Docter-cut optic does not screw directly to an RMR slide.

Match the optic to the cut instead of forcing it. A docter-to-rmr adapter plate, where the added height suits the slide keeps the sight seated square so it holds zero under slide cycling.

Related fitments

›Docter / Noblex footprintthe optic cut
›Trijicon RMR footprintthe slide cut
›Red-dot footprints explainedmatch a dot to a cut

Questions and answers

Will a Docter / Noblex optic fit a Trijicon RMR slide cut?

A Docter / Noblex-footprint optic fits only with an adapter plate a Trijicon RMR slide cut. The Docter/Noblex and RMR are different footprints, so a Docter-cut optic does not screw directly to an RMR slide. Use a Docter-to-RMR adapter plate, where the added height suits the slide.