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Upload pictures to this board, and they'll be here as long as the board is here (total crashes excluded).
There is no bolt extension, so it looks full auto to me.
You can see that the barrel door isn't straight. Looks like someone blew the gun, and the barrel door popped open from bending in the middle. You have to take off the door by drilling the rivets, then you can straighten it properly in a press and rerivet back into place. The spot weld would be in about the right place for the barrel stop, so it was either rewelded or replaced. Looks pretty good otherwise.
I am up in Canada so this guy does not work at all. Completely deactivated (but well done). I have been thinking of ordering a semi auto receiver and set to use this as a parts gun, but I would have to read into the legality of that before I do anything. Would that barrel release lever be hard to fix? I have no rivet experience...