Introducing the Crazy Jet 6.04mm Precision Barrel 410mm - a high-quality inner precision barrel measuring 6.04mm in diameter and 250mm in length, perfect for GBB replicas. Developed by Maple Leaf, this new precision barrel boasts a unique design featuring an enlarged diameter at the barrel's exit, creating a jet-like effect similar to that of a jet engine's nozzle. This results in the air in front of the BB being compressed and providing a smoother, more accurate shot. To achieve optimal performance with this barrel, we recommend using high-quality precision BBs. Perfect for use with GBB replicas. Length: 410mm Diameter: 6.04mm Weight: 95g Manufacturer: Maple Leaf.