Aftermarket CZ 858 Parts - Some Fitting Required

Mine was so tight the first time (the upper handguard that is) it had to be compressed down, by hand, to get the pin in. After an afternoon of 500+ rounds it really loosened up. The ball detent spring broke one day and the pin just dropped out during shooting. That's how loose it got. So I'll be running set screws on mine.
 
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Yup the fitting of the upper was not a 10 minute job for myself either, I put Fab on mine .. it fits but dang tight ... and who doesn't like tight ..... kit ;>)

cheers
 
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