Volquartsen Firearms Target Sear for Ruger 10/22 and 10/22 Magnum Silver. Drop-in item that requires no stoning. Made of A2 tool steel and hardened to Rc 5860. Specifications for Volquartsen Firearms Target Sear for Ruger 10/22 and 10/22 Magnum: Manufacturer: Volquartsen Firearms Color: Silver Fabric/Material: A2 Tool Steel Country of Origin: USA Gun Model: Ruger 10/22 Package Contents: Volquartsen Firearms Target Sear for Ruger 10/22 and 10/22 Magnum What firearm models does the manufacturer say Volquartsen Firearms Target Sear for Ruger 10/22 and 10/22 Magnum is compatible with? The manufacturer says that Volquartsen Firearms Target Sear for Ruger 10/22 and 10/22 Magnum is compatible with Ruger 10/22Volquartsen Firearms VC10ES: Target Sear for Ruger 10/22 and 10/22 Magnum Silver