I'm waiting on the 527 myself.
I've got one in a 22 hornet. Dandy little rifle. No complaints except the cumbersome mag.
Same here, and I don't mind the magazines, even. I have three 527s, and I've adapted......... I called my "CZ guy" today, just to check on when they'd have some. He didn't know for sure. I've got the components started on their way to the house, though.