Talon Meyer finds the polymer KWA EVE-9 AEG to be a good performer... "This is gameplay from a KWA polymer AEG called the EVE-9 which is a newer release introducing an all polymer external construction but leaves the newer adjustable velocity internals. The gearbox design was a concept added into their metal receiver bodies but as the industry of airsoft has shifted construction to be as lightweight as possible the need for alternative materials was needed. Even with a stock internal setup this AEG was an absolute performer! Stay tuned for a review as well with this rifle in the near future, subscribe to keep up on video releases."