Do they still make combination guns? Cz ,Brno or who ever ? 584 or zh304s etc can you still buy barrels for them ? Cheers thanks for any info

Yes they do!

http://www.czub.cz/index.php?p=32&idp=5&ids=32&idz=206&lang=en

And better still, on german Egun, one can find a gun and as many exchange barrels as one wishes, economi is booming in germany, those guys seems to change rifles every week or so.

Best regards Chris.