All fire arms either real steel or Airsoft require cleaning to maintain their performance and accuracy. JL Progression Barrel Cleaning Kit is a very useful tool to clean your AEG and GBB inner barrel to keep it dirt free. The set comes with four 8 inches aluminium rods with O-Rings attached to prevent scratching the inner surface of the barrel, it can set up to 33 inches long (838mm). From pistol to sniper rifle you have no problem cleaning the entire length of the barrels.