Is it really necessary to use a different magazine for 204, 223, and 222 in the CZ 527? I'm just curious. Don't most other makes of rifles use the same follower for all 222-family cartridges, another for 308-family, etc.? I can see why the 7.62x39 wouldn't work, but aren't the 223, 222, and 204 similar enough in dimensions to use the same mag?
Dan