Complete mainspring assembly designed for the Ruger MKII or MKIII. Mainspring components are wire EDM-cut and CNC-machined.
The Volquartsen mainspring does not feature the lock feature found on the Ruger factory MKIII Mainspring.
Models available for either the Ruger MKII/MKIII or the 22/45. Please pick the model that fits your gun. If you are not sure, please ask before buying.