The Volquartsen bolt Tune-Up kit is an essential upgrade for Ruger MKI, MKII, MKIII and MK IV target pistols, designed to enhance reliability and performance. This comprehensive kit includes the precision engineered exact edge extractor, compatible with MKII, MKIII, MK IV and 10/22 models, ensuring flawless extraction and ejection of spent cartridges. Additionally, the kit features the SureStrike firing pin, crafted for MKI, MKII, MKIII and MK IV pistols, which significantly reduces the occurrence of light strikes, providing consistent ignition with every shot. By addressing common issues such as stovepipes and misfires, the Volquartsen bolt Tune-Up kit is the perfect solution for shooters seeking to optimize their firearm's functionality and dependability. Whether you're a competitive shooter or a recreational enthusiast, this kit promises to elevate your shooting experience to new heights. Manufactured in the USA