Used Opponent Bag What Is The Old Computer Game Where Two Players Shot A Projectile At Each Other? I Think We Called It Gun?

What is the old computer game where two players shot a projectile at each other? I think we called it gun? - used opponent bag

In elementary school in the 1980s we had this "weapon" of the game in the big old floppy black and played in the old Apple computers at our school. It seems that all the players, "How many bags?" And "What we learn angle? To hit your opponent. Where can I find a copy?