CZ 858 Magazine issues

For all you Canadian Gunnitors Recently purchased a CZ 858 and it came with 4 of the 30 round magazines pinned to 5 rounds. One of them is having feeding issues and just hate the finish on all of em generally. Looking to disassemble and clean/refinish them but the pin is blocking the removal of the follower which the spring is also attached to. Anyone know of a work around?