Volquartsen Firearms Bolt Release and Hammer Pack for Ruger 10/22 Black. A great way to start customizing your factory 10/22 Specifications for Volquartsen Firearms Bolt Release and Hammer Pack for Ruger 10/22: Manufacturer: Volquartsen Firearms Gun Model: Ruger 10/22 Condition: New Country of Origin: USA Package Contents: Volquartsen Firearms Bolt Release and Hammer Pack for Ruger 10/22 What firearm models does the manufacturer say Volquartsen Firearms Bolt Release and Hammer Pack for Ruger 10/22 is compatible with? The manufacturer suggests that Volquartsen Firearms Bolt Release and Hammer Pack for Ruger 10/22 is compatible with Ruger 10/22Volquartsen Firearms VC10HB-B: Bolt Release and Hammer Pack for Ruger 10/22 Black