If you ever had gas get you in the eye shooting an AR you would appreciate the Gas Buster. I would like to (eventually) upgrade the entire fleet :lol: . I don't know why some rifles gas through the charging handle but they do. Even a gentle puff in the eye (I do wear glasses when shooting) will water my eyes. I think it's because the gas is spent gunpowder and that's why it's so irratating. If that small amount of regular air blew into your eyes I doubt it would cause as much trouble. Nothing worse than shooting a tournament with the clock running and have your eyes water so bad you can't see. Anything that increases safety and the shooting experience in general I'm for it.