CYMA 028 (top) & CYMA 028S (bottom)

-- metal gearbox
-- metal forend, receiver cover, charging assembly, selector, trigger guard, trigger & rear sight; metal buttstock for the 028S
-- ABS receiver, foreguards & grip (also buttstock for the 028)
-- 8.4v batt
-- adjustable hop up, not TM compatible

a good beginners replica, upgradeable, durable enough except for the underfolding stock of the 028S which is prone to problems

source: gunner airsoft