Replaces All The Springs For Precise Tuning Of The Government Model & Its Variations; "Guaranteed Superior"
GM-455 for the Colt Government Model .380 - Includes a 12 lb., extra power recoil spring with an extra power firing pin spring to improve functioning, plus a reduced power, 20 lb. main spring (hammer spring) to lighten trigger pull, and a factory standard 23 lb. hammer spring.
1911, Issue:02, Page:026
Big Book Catalog, Issue:66, Page:216