The Maple Leaf 6.02mm Tight Bore Air Cushion Inner Barrel for Sniper Airsoft Rifles is constructed out of copper manganese alloy and coated with nickel for long lasting durability and performance. Additionally, the rigidly weighted barrels minimize vibrations and consistently improves accuracy. The air track inner bore design reduces air dispersion to maintain BB stability as it travels out of the barrel. The 6.02mm bore requires high quality BBs in order to work properly and efficiently each time. This barrel is recommended for use in Well AWP Sniper Airsoft Rifles.