Cz 457 with Walther barrel ?

gr8guns

Sergeant of the Hide
Full Member
Minuteman
Mar 16, 2019
109
52
I have the CZ 457 in the Boyd‘s At One Stock. I have purchased and installed a Walther barrel. I am not schooled in the installation of barrels, so, here is the question……do I need a set of shims ? I simply put the barrel into the receiver until it bottomed out, and tightened it up…..advice?