Optic Adapter PlatesMid-Range

Dorin Technologies

Dorin DT-CAOS FN Five-seveN Mk2 Optic Mounting System

Mk2-only optic mounting system with interchangeable plates and the factory rear sight retained

Quick Specs

Price
$150
Weight
N/A
Brand
Dorin Technologies
Category
optic-adapter-plate

Features

  • FN Five-seveN Mk2 only
  • RMR, Docter, DPP, Shield, Holosun K/EPS, and RMRcc plate choices
  • Factory rear sight remains installed
  • No permanent slide modification

Compatibility Tags

family: handgunplatform: builder-hiddenadapter-plate: dorin-dt-caosoptic-mount: rmroptic-mount: 507coptic-mount: dppoptic-mount: shieldoptic-mount: holosun-koptic-mount: epsoptic-mount: holosun-epsoptic-mount: rmrcc

Overview

The Dorin DT-CAOS gives a true FN Five-seveN Mk2 a removable optic-mounting system while leaving the factory rear sight in place. The base system includes a cover plate, and interchangeable optic plates support standard RMR-pattern optics, Burris FastFire and Docter-pattern optics, DeltaPoint Pro, Shield RMS/RMSc, Holosun 507K/EPS, and Trijicon RMRcc footprints. No permanent modification to the pistol is required.

Fitment stops at the Mk2. Dorin identifies that model by the charging serrations on the front of its factory slide cover and excludes the smooth-front Original, Tactical, IOM, and USG models as well as the later MRD/Mk3. The factory sights do not co-witness through the optic, and a small number of wider factory slides may need minor fitting because of production tolerances.

Key Features

  • Dedicated fit for the FN Five-seveN Mk2
  • Interchangeable footprint-specific optic plates
  • Factory rear sight remains installed
  • Included cover plate supports use without an optic
  • No permanent modification to the pistol
  • Front slide serrations provide the key Mk2 identification check

Pros

  • +Adds an optic path to the otherwise non-optics-ready Mk2
  • +Supports several common full-size and compact pistol-optic footprints
  • +Preserves the factory rear sight and can return to a plain cover plate
  • +Installs without permanently altering the pistol

Cons

  • Does not fit Original, Tactical, IOM, USG, MRD, or Mk3 pistols
  • Factory sights cannot co-witness through an installed optic
  • Minor fitting can be necessary on a slide at the wide end of factory tolerances

Detailed Specifications

Mount Type
Dorin DT-CAOS interchangeable optic mounting system
Platform Fit
FN Five-seveN Mk2 only
modelIdentification
Factory slide cover has charging serrations at the front
opticFootprints
RMR/SRO/407C/507C/508T; Burris FastFire/Docter/Vortex Viper or Venom; DeltaPoint Pro; Shield RMS; Holosun 507K/EPS; Trijicon RMRcc
rearSight
Factory rear sight retained; no co-witness
includedPart
DT cover plate
Manufacturer SKU
DT-CAOS

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