I had my M2000 stored in the box it came in (barrel disassembled from the receiver and stock). I just picked it up and 2 small parts fell out from God know's where. One is a spring about 3/8" long and the other is about the size of a BB but shaped like a round nosed bullet. I looked through the manual and cannot find where they belong. I also looked online for a schematic but no luck. Anyone have a clue? This gun has BARELY been used....