Wolff WILSON 1911 TUNGSTEN RECOIL CALIBRATION PAK

Recoil Calibration Pak – This pak contains 1 each of 16, 18 and 20 Lb. extra power recoil springs and 3 extra power firing pin springs.  Allows the shooter a choice of recoil springs to calibrate the recoil function and saving 20% over individual spring prices.