Drats! Just broke the gun down completely. On a good note, it was sparkling clean, very little residue, but on the bad note, I bent the bolt return spring. I called Mossberg, all I did was tell them what model, they already knew what I wanted. Its on back order, they are sending me two for free. LOL. I asked what other parts are commonly ordered, the guy on the phone laughed and said magazines and that spring. I can still fire it, but its all manual now.