The Docter footprint
The Docter is a pistol optic footprint that mounts with 2 screws (screw_through). 6 red dot optics use the Docter footprint, including the Burris FastFire 3, Burris FastFire 4 and Crimson Trace CTS-1250 Compact Open Reflex Sight.
Docter / Noblex pattern (historically Doctersight). Two screws and four corner sockets to accept recoil pins. Older European standard, predates RMR's industry dominance. Used by Burris FastFire 2/3/4, Vortex Viper, Vortex Venom, Hex Dragonfly, Primary Arms SLx RS-10, Sig Sauer Romeo1 (original), Meopta Meosight, Viridian RFX25, and several other mid-2010s reflex sights.
Footprint specifications are compiled from manufacturer drawings and optic spec sheets.
Optics using this footprint · 6
- Burris FastFire 3
- Burris FastFire 4
- Crimson Trace CTS-1250 Compact Open Reflex Sight
- Primary Arms SLx RS-10
- Vortex Venom
- Vortex Viper
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Frequently asked
What optics use the Docter footprint?
6 optics use the Docter footprint, including the Burris FastFire 3, Burris FastFire 4, Crimson Trace CTS-1250 Compact Open Reflex Sight and Primary Arms SLx RS-10.
How is the Docter footprint mounted?
The Docter footprint uses 2 screws and a screw through mounting style. It also incorporates 4 recoil lugs to resist rearward movement under firing.
Is the Docter footprint part of a larger family?
The Docter footprint is part of the Docter / Noblex family. Optics and adapter plates within the same family often share compatible mounting dimensions, which can expand which pistols and adapter solutions are available.