B-Square no gunsmithing semi auto pistol mounts integrate with the pistol's original components to assure optimum performance with every trigger-pull, superior to any grip mounted system.
Features and Specifications:
Manufacturer Number: 42878
Finish: Stainless Steel
For non-drilled Ruger MK I and MK IIs only
Standard Weaver-style Base
Ruger MK I/MK II Universal (slides on receiver)