The RMR cut refers to the Shield RMR, Shield RMSc, Shield SMSc optics. It is a different footprint from the Trijicon RMR footprint. You would be able to use optics like the ones previously listed as well as the Sig Romeo Zero, Holosun 407K and 507K.
The RMR cut refers to the Shield RMR, Shield RMSc, Shield SMSc optics. It is a different footprint from the Trijicon RMR footprint. You would be able to use optics like the ones previously listed as well as the Sig Romeo Zero, Holosun 407K and 507K.