The Madbull 6.01mm Precision Barrel is the tightest bore barrel available and the only choice for players looking for the best possible accuracy and range. Madbull have boldly gone where no company has gone before, this barrel is constructed of 7075 Aluminum. Most real gun and aircraft manufacturers utilize 6061 Aluminum, but this barrel is made of even higher grade aluminum. The characteristics of this metal are perfect for airsoft, it's strong to keep the BB on track and light so it won't add significant weight to the gun.
The bore of this barrel is so tight around the BB that even the smallest obstruction in the barrel will cause a jam when fired. This barrel is recommended ONLY for advanced/experienced players that take the responsibility to clean their barrels regularly in order to avoid jams. Airsoft GI recommends cleaning this barrel after every day of use.