In reguards to the concern about CZ and losing the restricted/choked muzzle end and losing accuracy when you shorten .
Donot worry about it , as in reality , you will not notice any difference in accuarcy , in the UK about the most common mod done on the CZ rimfire rifles is to shorten barrel down to 12 inches for a silencer , and they have no accuracy problems doing it .
Later Chris
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