CZ Shadow 2 / SP-01 - Hammer / Main Spring Calibration Kit by CZ Custom 

CZ Custom
All CZ Models (Except P10c Need to be Cut for Rami)
Main Spring Calibration Kit

Kit contains main / hammer springs from 10lbs to 16lbs these springs can be used adjust the double-action trigger weight.

CAUTION: If the pistol is to be used in critical situations such as law enforcement or self-defense. Reduction of the hammer spring strength may compromise reliability of the firearm.

Our testing has shown the 13lb mainspring in combination with a CZC extended firing pin and CZC 2075 Rami firing pin spring will ignite the primers in the factory ammunition that CZ Custom uses. Given variables in ammunition, primers, reloading techniques your results may vary. 
CZ Custom is not responsible for your results.

Kit Contains
10LB, 11LB, 12LB, 13LB, 14LB, 15LB and 16LB Springs