The Crazy Jet 6.04mm Precision Barrel 370mm is perfect for use in GBB replica guns. This high-quality inner precision barrel boasts a diameter of 6.04mm and a length of 370mm. Developed by Maple Leaf, the Crazy Jet precision barrel features a unique design with an increased diameter at the muzzle, creating a jet-like effect that improves accuracy and does not compromise velocity. Make sure to use only high-quality precision BBs with this barrel for optimal performance. Length: 370mm Diameter: 6.04mm Weight: 85g Manufacturer: Maple Leaf