The Maple Leaf Crazy Jet Barrel is a barrel with a new design.
Maple Leaf has designed a barrel whose end is wider than the rest of the barrel. At the end of the barrel, the air flows past the BB and exits first. When the BB leaves the barrel, the airflow pulls the BB into a so-called jet stream. This creates less resistance on the BB, and instead of reducing speed, it actually increases accuracy!
GBB hop-up rubbers are required.