Hey y'all. I'm referb-ing this m9 I got for cheap, but it's got a few problems, this being a big one. The hammer catches back when you cock it by hand but if you pull it fast it won't catch. This also causes full auto fire occasionally.....
I had the thing open recently and the internals didn't look too worn, but I figure other people have dealt with similar problems, so before I open it up again thought I'd ask. That way at least I'll have a few things to look for when I do open it back up.
Video of it misbehaving:
https://www.youtube.com/watch?v=wtKDdD5LQQg&feature=youtu.be
