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 lite 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 with 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. Fits: CZ 40 B, CZ 40 P, CZ 75 B, CZ 75 B Compact, CZ 75 B SA, CZ 75 BD, CZ 75 D PCR, CZ 85 B, CZ P-01, CZ SP-01 Tactical, CZ SP-01 THAT USES A FIRING PIN BLOCK SAFETY

Will NOT fit: CZ Shadow 2, P-07/P-09, CZ P-10, TS2, TS, TSO, SP-01 Shadow, Canik/TriStar OR ANY ABOVE MODEL THAT DOES NOT HAVE A FIRING PIN BLOCK SAFETY

Note: Made for COMPETITION USE, if in doubt, please consult your gunsmith

Manufacturer Model #: SRS-2