Maple Leaf 6.02mm Crazy Jet Inner Barrel with Hop Up Chamber for GHK M4 GBB (310mm)

Maple Leaf 6.02mm Crazy Jet Inner Barrel with Hop Up Chamber for GHK M4 GBB (310mm) Metal Construction Precision Barrel at 6.02mm Diameter Built for extra power and precision shooting Designed to increase the FPS of your Pistol Package Come With Hop-Up Chamber Set Suitable For GHK M4 Series Airsoft Gas Blow Back GBB Pistol Airsoft Guns Length: 310mm