I think Andy was just holding the Thompson, Barney on the roof tipped over a box of Christmas lights, and they went pop pop pop. And that's what made the robbers stop.
I believe that Mr. Fox goes by the name of "1921A" on this board. You can PM him with a search or find a post of his and click on his "1921A" and send a private message.
I agree with the comments by everyone on this. West hurling, the buffer pilot looks chrome finish or just very worn. Who knows, but did find this on T.V.A. search, AI.