I have a couple of the 527 rifles and am using two different means of attaching scopes.
This setup on a 223 Varmint and Weaver LOW rings:
https://www.diproductsinc.com/Detail...12045&CAT=3600
This setup on a 222 American:
http://www.jamescalhoon.com/pricelist.php
They both help get the scope lower than the factory rings but the second option is lowest of the two. If your bolt handle is not of relatively recent manufacture, you will likely have to grind it, exchange it with Mr. Calhoun or order the thinner bolt handle directly from CZ, but it IS worth it.
Of the two setups, I prefer the simplicity and low height of Mr. Calhoun's rings, which are also of very nice quality. They are not cheap but by the time you buy the other base and a set of rings, it's close. One of these days, I plan on pulling the DIP base off the 223, selling the base and buying another set of Mr. Calhoun's rings.
If you want the higher factory rings, I have a set I'd let go that went onto my rifle and came right back off. I have a short neck, short arms, short fingers,..... I NEED a scope to be as low as possible myself. With the drop on your Carbine stock, I personally think the factory rings would probably be too high for about anyone.
I don't work for Mr. Calhoun - I just know it can be a chore to find the right rings/base/scope combo for the 527 and hope to save anyone else that frustration if possible.