Individual Springs To Improve Functioning
Extra Power Recoil Spring fits .22 LR only. Slows the bolt down for optimal cycling when using hyper-velocity ammunition. Factory Power Recoil Spring available for .22 LR or .22 WMR/.17 HMR. Replaces worn out factory spring to help ensure reliable performance. Gunsmith installation of recoil springs recommended.
Big Book Catalog, Issue:66, Page:182