I've noticed that I can move very very easy the right slide stop lever of my CZ-85B up and down for a milimetre or two. If I shake the pistol just a little bit it moves! The pistol was made in 2002, and it came new that way. But I don't have the same problem with my two years older CZ-85B. Its right slide stop lever is not so loose, doesn't move freely at all. Also, this happens only when the slide is not locked back. If it is locked back than the right lever is also rock solid.
Is this normal, or something is broken? Also, without the left lever in the pistol, when it is disassabmled for example, it is not loose. Something broken or just normal?
Please help.