About This Ruger Mark IV Midmount
Armadyne Ruger Mark IV Midmounts fit pistols with the standard three-hole receiver pattern. The Midmount spans the ejection port and moves the optic farther rearward while maintaining a low-profile direct-mount position.
Direct mounting keeps the red dot closer to the receiver than a Picatinny or Weaver rail with a separate optic mount.
Compatibility
This line is for standard three-hole Ruger Mark IV receivers with two threaded holes ahead of the ejection port and one behind it.
- Ruger Mark IV 22/45 Lite models 43946, 43947, and 43948 use the Riton-Equipped Ruger Mark IV mounts.
- Silencer Shop Exclusive models 40179, 40181, 40182, 40186, and 40193 use the Silencer Shop Exclusive Ruger Mark IV mounts.
How the Midmount Position Differs
Standard mounts sit fully ahead of the ejection port. The Midmount uses the threaded hole immediately ahead of the ejection port and the threaded hole behind it, allowing the mount to span the port. Choose the version that matches your optic footprint.
Installation Notes
Unload the firearm and remove the factory rail or other mount. Secure the Midmount with the supplied two #6-48 x 1/8 flat-head screws.
Attach the optic to the mount and dry-fit the assembly on the receiver before final installation. Confirm that no optic screw can protrude far enough to contact or scratch the receiver.
Follow the Ruger Mark IV installation instructions for the complete screw-length check, torque values, and optional thread locker adjustment.
Designed and Manufactured in the USA
Armadyne mounts are designed and manufactured in the USA. Each mount is CNC machined from 6061-T6 aluminum in our Lincoln, Nebraska shop, then sandblasted and finished with H-Series Cerakote for wear and corrosion resistance.
Warranty and Returns
Armadyne stands behind the mounts and components we manufacture. Review our warranty and returns information for support, exchanges, and discretionary return terms.
