1. I think you mean "cylinder", not "magazine"?
2. Do you have the barrel-cylinder gap feeler gauge that came with the gun? If so, does it fit between the cylinder and the barrel? If not, you probably have the barrel screwed in too tight. Assuming that you have the barrel tool, take the barrel nut off using it. Remove the barrel shroud. Then unscrew the barrel until the feeler gauge will easily slide in and out while still having contact with both surfaces. If you don't have the gauge, just unscrew the barrel a turn and see if the cylinder opens. If so, it's still the barrel turned in too tightly. Contact CZ/DW and order a feeler gauge.