. The pistol grip didn't come with a screw to fit into the original block (I blame that on Canada customs who opened all the packages...WTF for? oh yea $17 customs duty) I made a bolt from a 1/4" coach bolt approx 1 1/4" long with lock washer and nut. Fit really well and tight. The pistol grip is awesome and with me an my large hands it fits better than the red grip.
i presume you could not reuse the original CZ858 bolt and screw.






















































