MIDWEST MK2 30MM RMR CAP 45 OFFSET

When your optic needs a solid foundation, an offset mount at 45 degrees keeps your sight line clear while maintaining co-witness capability. At TacticCAL in Sunnyvale, we stock precision mounting solutions for shooters who demand reliability. Need help with your purchase? Our team handles FFL transfer in Sunnyvale for all your firearms and accessories.

30mm Tube Mounting and Offset Geometry

The MK2 receiver extension accepts 30mm optics with this dedicated RMR cap, positioning your red dot at a 45-degree angle. This geometry works well for carbines running co-witness setups or pistol-caliber platforms where you want backup irons in the primary sight plane. Midwest Industries builds these mounts to tight tolerances. For shooters in our area exploring other sight systems, we also support PC §32100 exempt revolvers with appropriate optic rails. TacticCAL is your gun store in Concord for Bay Area shooters.

Frequently asked questions

Will this RMR cap fit other 30mm mounting systems?

No. This cap is designed specifically for the Midwest Industries MK2 receiver extension platform. Verify your upper receiver or chassis uses the MK2 system before ordering.

What's the weight addition to my rifle setup?

This component ships at 0.159 pounds, making it negligible for overall platform weight. Ideal for builds where minimizing top-end mass matters.

Does TacticCAL help with CA compliant firearms?

Yes — TacticCAL specializes in California-compliant handguns from the DOJ Roster and PC §32100 exempt single-action revolvers. TacticCAL is your gun shop in Sunnyvale, CA.