Wolff Recoil Calibration Pack for Glock 17, 17L, 20, 21, 22, 24, 34 and 35 rail covers Automatic shutdown of protectors after

Automatic shutdown of protectors after 2 hours of inactivity

Fog & Water Resistance

300 hours' operation

golf balls can be launched 100s of yards

39 GEN 1-3

Wolff Recoil Calibration Pack for Glock 17, 17L, 20, 21, 22, 24, 34 and 35 rail covers Automatic shutdown of protectors afterDescription 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. 13141 Reduced Power Recoil Calibration Pak Pak contains 1 each reduced power recoil springs in 12, 14 and 15 pounds. Three factory strength striker springs are also included. *NOT for GLOCK Generation 4 & 5 models Fit for