G&G Scar piece fell out
 

So I've owned my scar for about a week and I noticed a rattle. I took it to my gun doc and he found this little guy hanging out on top of my hop up adjustment.

http://i971.photobucket.com/albums/a...h/ef5c80a1.jpg

After he took his time to strip it all down everything looked / worked proper. There doesn't seem to be a place for that so I'm wondering if this has happened to anyone else? Bonus parts in your gun?