The Viridian Weapon Technologies RFX-35 1x22mm Micro 3 MOA Green Dot Sight is not compatible with an MC2SC. The MC2SC fits optics that use the RMSc or K footprint such as the Sig Romeo Zero, Vortex Defender, Holosun EPS Carry, Holosun 407K/507K, Shield RMSc and more.