This base is compatible with the Ruger Mark Serries and all of the ModMount spacers and mounts. Mount Smarter, Go Modular. The Armadyne ModMount system provides a sleek, modular, and lightweight solution to more traditional mounting solutions. Each base has a standardized slot that interfaces with the optic mount to provide a rock solid attachment. Optional spacers allow for flexible heights to achieve a specific co-whiteness or to fit whatever application the user needs. To learn more about this system please visit the main page! Compatibility Distance between receiver screws is 2.36 inches. If the optic length exceeds this additional spacers may be needed to install the base to the receiver with the optic installed. To view other ModMount products please visit the main page.
