Checking out a CZ 75B and have a question-- When releasing the mag, it only drops a bit then hangs up... Is this normal? I really like my pistol's mags to freely drop, if not eject the mag. PLEASE NOTE: This a California gun w/ a 10rd mag that has a plastic base about an inch up the mag, then metal above to its top. Don't know if the CA mag is the problem or this is just how CZ dials them in... Please let me know soon since I'm in the buying mode.