Kits & individual Springs To Improve Functioning
Kit contains (1) extra power, 24 lb. Blitzschnell striker spring and a 20% reduced power trigger/sear spring. Trigger/sear spring fits models chambered in .17 HMR, .17 Mach 2, .22 LR, and .22 WMR. Also fits Centerfire models EXCEPT for target models and Hawkeye Series. Not for use in discontinued Model 77.
Big Book Catalog, Issue:66, Page:182
New Product Supplement, Issue:602, Page:013