Correct-Weight, Factory Original Springs For Reliable Cycling
Premium-quality, steel alloy springs help you keep your Kimber running as smoothly and reliably as it did when it came out of the box. These are the same springs that are installed in .45 ACP/.40 S&W Kimbers at the factory. Each kit includes a factory weight recoil spring, firing pin spring, and mainspring. Full Size kit fits original Government model and full-size Kimber pistols with 5" barrel; 16 lb. recoil spring for all-around reliability with a wide range of ammunition. Compact fits Kimber Compact pistols with 4" barrel and short (Officers length) grip frame requires factory weight 22 lb. recoil spring.
1911, Issue:11, Page:032
Big Book Catalog, Issue:68, Page:131
SPECS: Tempered spring steel alloy.