I just bought a used M9 and I found that there is a broken part inside it. It's part number 14 on this part diagram
http://www.kicbbgun.com.tw/menu/kj-m9s.jpg
I think it's just for keeping the outer barrel in place but I thought I should ask here and see if anyone knows, I was told the gun fires properly anyway. Anyone know what that part is for and if I need to replace it? If I do need to replace it where can I get it?
John.