Stand alone shooter system made by Takara. Attaches to one of those "Game box" things that uses technology liscened by Xavix.
There are three different models, the standard pistol version, one that has a pumping "shotgun" action, and one where the guns are slightly longer and rifle like. As far as I can tell there's three games that may or may not be interchangable, a target practice game, one where you shoot criminals, and one where you kill pokemon-type monsters.
More info is needed.