Midwest Industries MK2 Trijicon RMR Mount, 1/3 Co-Witness

The Midwest Industries MK2 RMR Mount (brand part no. MIMK2RMR1/3) sets a Trijicon RMR-footprint red dot at a 1/3 lower co-witness height, positioning the dot in the lower third of the sight picture above standard-height AR iron sights. It bolts to a Picatinny or 1913 rail as a fixed mount rather than a quick-detach design, giving a solid, repeatable zero with nothing to work loose. It is machined as part of Midwest’s MK2 mount series, matching the fit and finish of the rest of the lineup. The 1/3 co-witness height suits shooters who want their irons visible as a backup without stacking the dot directly over them.

Key Specifications

• Optic compatibility: Trijicon RMR footprint.
• Co-witness height: 1/3 lower, positions the dot in the lower third of the sight picture above standard-height irons.
• Attachment: fixed clamp, bolts directly to a Picatinny/1913 rail rather than a quick-detach lever.
• Series: MK2 mount line, shares the fit and finish of the rest of Midwest’s MK2 mounts.

Frequently Asked Questions

What optic footprint does this mount use? It is cut for the Trijicon RMR footprint.

What does 1/3 co-witness mean here? It sets the RMR’s dot in the lower third of the sight picture, so standard-height iron sights show up below the dot rather than directly behind it.

Buy the Midwest Industries MK2 RMR Mount, 1/3 Co-Witness

Get a solid backup iron sight setup for your RMR-footprint red dot — order the MK2 1/3 co-witness mount from Schaefer Defense and browse our full red dot mounts selection for more co-witness height options. Ships fast from our Lubbock, Texas gun shop.