Two side stories after it arrived.
The previous owner was a "grease fan", applied lots of toothpaste-like white color gun grease inside, that took me half an hour to clean up
I thought I checked everything and put it aside. But I felt there was something I ignored.... what? I could not remember.... During dinner, suddenly I remembered the part that I ignored: Was the magazine follower on this one numbered? It's supposed to be numbered.... The more I tried to remember previous inspection detail, the more I could not remember anything, the more I could not just sit there eating. Rushing back, checked it again... it's correctly numbered. Thanks the Lord! What a relief.