GHK - Ver 2 Enhancing Steel Bolt Carrier and Bolt Catch Upgrade Kit for GHK M4 GBB Rifle Module which features the Crusader Upgrade

which features the Crusader Upgrade Kit making it more realistic and feel more heavy

and takes both green gas and co2 shells (two types of shells available separately) to accommodate whichever power source that is more readily available at one's country

G&P or other compatible Airsoft AEG

62¡Á39mm cartridge

Package includes the following:

GHK - Ver 2 Enhancing Steel Bolt Carrier and Bolt Catch Upgrade Kit for GHK M4 GBB Rifle Module which features the Crusader UpgradeThe GHK Ver2 Enhancing Full Steel Bolt Carrier and Bolt Catch Upgrade Kit for Any GHK M4 GBB Rilfe, Easy to Upgrade your GHK M4 GBB Ver 1. Material: Steel Package Included: GHK M4 Ver. 2 Steel Bolt Carrier, Ver. 2 Bolt Catch Set