HAO L119A2 CQBR Monolithic Kit ( IUR ) for GHK M4 GBB Rifle Airsoft ( Full Kit )
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
Out of Stock--GHK GAS GBB Gearbox Kit For M4 Series AEG [GHK-PT-GEARBOX-M4-AG] - US$100.00 : Airsoft Global!, Gun
Angry Gun RD704 GT SBR Style M-LOK Handguard Rail Conversion Kit for Marui TM AKM GBB Series
GHK Gas Blow Back Conversaion Kit For M4/AR AEG Airsoft Tiger111HK Area
HK416D STD Conversion Kit for Tokyo Marui MWS GBB
Matrix/GHK G36 Airsoft AEG to GBB Complete Gearbox Conversion Kit w/Magazine - Hero Outdoors