Thanks for the replies guys. The mags in both my Shadows drop free, so I have to go with the assumption that the magazine brake isn't really a brake at all. I think it is more of a guide for unimpeded mag insertion. This may not be the case on other CZ pistols. I am stumped by the small tail on the Compact model though and what its purpose is, if any. My best guess is that it's there to keep the magazine brake in perfect position, but if that's the case why isn't the small tail on the full size Shadow? I will say the tail on the mag brake makes installation of the brake more complicated and time consuming. It would be nice to know what the correct assembly process is for this item so as not to break the brake!
Rick H.