Wolverine Airsoft Replacement Brass Inner Barrel for MTW M4 HPA Airsoft Rifles (Size: 380mm)

Features Heavy duty brass construction 380mm length is perfect for the 14.5" MTW outer barrel Factory direct OEM replacement part Drop-in design requires little to no modifications to fit Manufacturer: Wolverine Airsoft Specifications: Overall Length: 380mmCompatibility: Wolverine Airsoft MTW M4 Series and Other Compatible HPA Airsoft RiflesDetermining the barrel length you need:To estimate your inner barrel length. Measure from where the magazine feeds in the bb, to the tip of your barrel or where you want your inner barrel to be. Subtract 5mm (for hopup unit). Generally you want it to be as long as possible for accuracy.