TANDEMKROSS Rebound Springs for Ruger MKI/II/III/IV & 22/45 5-Pack Black. Stock up on replacement rebound springs and avoid the hassle of a missing or broken part when at the range or working on your gun. These Ruger MKII MKIII MKIV and 22/45 rebound springs match the factory rebound spring specifications for an ideal fit in your Ruger MK series pistol. These are a drop-in part that require no tools to install. The springs come five in a pack to ensure you always have extras on hand. Specifications for TANDEMKROSS Rebound Springs Ruger MKI/II/III/IV & 22/45 5-Pack: Manufacturer: TANDEMKROSS Color: Black Gun Make: Ruger Gun Model: Ruger Mark IV Ruger Mark I Ruger 22/45 Ruger Mark III Ruger Mark II Additional Features: Drop-in part that require no tools to install Condition: New Features of TANDEMKROSS Rebound Springs Ruger MKI/II/III/IV & 22/45 5-Pack: Product specs match factory spring for ideal fit Replaces factory rebound spring Easy Drop-in part that require no tools to install Supported Models: Ruger MKI Ruger MKII Ruger MKII 22/45 Ruger MKIII Ruger MKIII 22/45 Ruger MKIII 22/45 LITE Ruger MKIV Target Ruger MKIV Hunter Ruger MKIV Competition Ruger MKIV Tactical Ruger MKIV 22/45 Tactical Ruger MKIV 22/45 LITE Package Contents: TANDEMKROSS Rebound Springs Ruger MKI/II/III/IV & 22/45 5-Pack What firearm models does the manufacturer say TANDEMKROSS Rebound Springs Ruger MKI/II/III/IV & 22/45 5-Pack is compatible with? The manufacturer suggests that TANDEMKROSS Rebound Springs Ruger MKI/II/III/IV & 22/45 5-Pack is compatible with Ruger Mark II Ruger Mark III Ruger 22/45 Ruger Mark I Ruger Mark IVTANDEMKROSS TK05N0171BLK1: Rebound Springs for Ruger MKI/II/III/IV & 22/45 5-Pack Black