Wolff RECOIL CALIBRATION PAK XP for GLOCK 17,20-22,24,34,35

Recoil calibration paks offer the shooter the ability to adjust the recoil function with an assortment of different weight recoil springs. Calibration paks offer a savings over purchasing spring individually.

Stock No. 13140 – Extra power Recoil Calibration Pak – Pak contains 1 each recoil springs in 17, 19, 20 and 22 pounds. Includes three factory strength striker springs.  Not for Generation 4 models