Not sure if that screw is broke or not I will have to look at the other side to see if its the same.
As for the barrels they have not had anything done to them. I will measure length. Yes it locks tight and seems to be in good working condition. As for pits and dents, there is a small dent on the outside of the right barrel but when you look down the inside you cannot see the dent. There is a VERY SMALL amount of pitting inside, maybe 3 spots 1/4 to 1/2 inch close to the chamber that is pitted lightly. They would probably buff most of the way out with a bore brush but until I get an idea of what the gun is and what its rough value might be I don't want to mess with the gun.
