Z-Parts MK16 DD GOV Steel Outer Barrel for GHK M4 GBB (16 inch)

Z-Parts MK16 DD GOV Steel Outer Barrel for GHK M4 GBB (16 inch) Steel Construction Suitable For GHK M4 Series Airsoft Gas Blow Back GBB Rifle Essential for building the URGI complete gun if doing it from scratch