Gun Fight was released in November 1975. It was also released as "Gun Fight [Cocktail Table] [Model 604]".
Gun Fight was based on Taito's Western Gun, a game which used TTL-based discrete logic hardware. Midway's Dave Nutting adapted the Taito game to use an Intel 8080 microprocessor. Gun Fight was the first Japanese title to be licensed for release in America. It was also the first video game to incorporate a microprocessor, and the expanded processing capabilities allowed for graphics and game-play much more advanced than "Pong
Gun Fight was a pretty important video-games innovator. It was the first game ever to have 2 on-screen humans battling against each other at the same time, and as such it's the grandfather of the fighting games that take up most of the floorspace in modern arcades. It also introduced the idea of having separate controls for aiming and moving.
More than 8000 units were produced in the US.
A Gun Fight unit appears in the 1978 movie 'Dawn of the Dead'.