I recently purchased a cz52 and after buying it i shot a few clips through it, cleaned it, and put it up. I have since gotten it back out(only a few days later) and loaded the clip, put it in the gun, let the slide go, and it went full auto and ran the whole clip through. I have since messed with it and the hammer follows the slide closed most of the time. it does more often if there is a actual shell being loaded as opposed to just working the slide with no clip in it. anyone have this happen? thanks sb