GHK M4 V2 Bolt Carrier and Magnetic Bolt Lock Kit for GHK M4 Gas Blowback Rifles, Accessories & Parts, Gas Gun Parts, Gas Rifle Bolts - Evike.com Airsoft Superstore
GHK GAS GBB Gear Box Kit For M4 | MLEmart.com
GHK 16" DMR Conversion Kit For GHK G5 Series Airsoft GBB Rifles - Black, Accessories & Parts, Gas Gun Parts, Gas Gun Conversion Kits - Evike.com Airsoft Superstore
SRU 3D Printed Bullpup Conversion kit for GHK G5 Gas Blowback Rifle (Color: OD Green), Accessories & Parts, Gas Gun Parts, Gas Gun Conversion Kits - Evike.com Airsoft Superstore