This is a “Master” kit that allows you to tune your CZ for self-defense, range, or competition use. Includes an HS-12000, 11.5# (black) hammer spring for competition, and HS-13 (blue) hammer spring for self-defense.
Also, includes a reduced power firing pin block plunger spring, 61100 tempered spring steel firing pin retaining pin, firing pin lifter arm spring, “low-lift” 61050 firing pin w/spring, and our “short” arm lifter w/spring.
Shortens the SA reset by an average of 40%. HS-13 hammer spring will reduce the DA pull weight by 40-45% but still retains a reliable ignition. The competition only HS-12000 hammer spring will reduce the pull weight by 50-60% but will require the use of Federal primers only.
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