Awesome spear gun that from the first moment it hits the water, you realize it's worth the money you've paid. It has a powerful and sturdy barrel (comfortably accommodates a second rubber if desired). I do relatively shallow diving (up to 15 meters), so it is quite powerful up to that depth. For deeper dives, I think you should go for the PRO version with the two rubbers, or if you have bought this one, simply purchase an additional rubber.