M77 Mark II kit contains (1) extra power, 24 lb. Blitzschnell striker spring and a reduced power trigger/sear spring. Reduced power trigger/sear spring fits 77/22 models chambered only in .17 HMR, .17 Mach, .22 LR, .22 WMR and the 77/44. The reduced power trigger/sear spring also fits Ruger 77 MKII centerfire models EXCEPT for target models and Hawkeye series. Not for use in dicontinued Model 77.
M77 Mark II kit contains (1) extra power, 24 lb. Blitzschnell striker spring and a reduced power trigger/sear spring. Reduced power trigger/sear spring fits 77/22 models chambered only in .17 HMR, .17 Mach, .22 LR, .22 WMR and the 77/44. The reduced power trigger/sear spring also fits Ruger 77 MKII centerfire models EXCEPT for target models and Hawkeye series. Not for use in dicontinued Model 77.