This is an old J.F. Frantz U.S. Marshal Shooting Coin-Op Game.
There is a date of 1925 on the gun. It's mechanical and takes no wires or batteries. You just need 10 cent coins to operate.
It has significant wear because of it's age. It still shoots though. This is a COMPLETE game and I even have the keys! Other sellers are selling for much more. Selling as-is.