KWA got the AK-74 in both Electric Blowback (EBB) and Gas Blowback (GBB) editions. Airsoft GI's  Aaron does a quick comparison of both in this video... "In this video Aaron goes over the KWA AK74 in the GBB and ERG configurations! A quick glimpse at what the recoil AK world looks like from the handiness of KWA."