Volquartsen Firearms Standard Pistol Recoil Spring Ruger MKII MKIII MK IV and 22/45. These Ruger Pistol Parts from Volquartsen Firearms deliver powerful blows back to your target with every trigger pull ensuring you take down targets at any range. This Volquartsen Pistol Spring and Retention Rod Combo is the perfect addition to any build since it includes a recoil rod and spring in one package allowing you to greatly enhance your shooting experience. Pick up this Volquartsen Standard Recoil Spring Ruger MKII MKIII MK IV Ruger 22/45 to customize your shooting experience and gain better control over your gun. Specifications for Volquartsen Firearms Standard Pistol Recoil Spring Ruger MKII MKIII MK IV 22/45: Manufacturer: Volquartsen Firearms Gun Make: Ruger Gun Model: Ruger Mark IV Ruger Mark III Ruger Mark II Caliber: .22 Long Rifle Country of Origin: USA Features of Volquartsen Firearms Standard Pistol Recoil Spring Ruger MKII MKIII MK IV 22/45 This spring is designed only for use with the recoil rod packaged in our kit Package Contents: Volquartsen Firearms Standard Pistol Recoil Spring Ruger MKII MKIII MK IV 22/45 What firearm models does the manufacturer say Volquartsen Firearms Standard Pistol Recoil Spring Ruger MKII MKIII MK IV 22/45 is compatible with? The manufacturer says that Volquartsen Firearms Standard Pistol Recoil Spring Ruger MKII MKIII MK IV 22/45 is compatible with Ruger Mark II Ruger Mark III Ruger Mark IVVolquartsen Firearms VC3RSO-S: Standard Pistol Recoil Spring Ruger MKII MKIII MK IV and 22/45