"So I got this on sale for $40 for a loaner and wasn't expecting much, but am PLEASANTLY surprised! I have a Dboys m4 with the metal gearbox and this CM207 model is almost identical except for the plastic parts! So as you may imagine everything that CAN be plastic on this gun IS, but the gearbox can be replaced by a metal one, the barrel can be replaced etc. etc. It actually shoots pretty good, I don't have a chrono but I can easily hit a man size target at 70 feet or so. The full auto isn't very fast, maybe 5 shots per second and the trigger feels "funny" on semi, but overall, the gun still functions well. The battery is small (650 mah), and the hi cap magazine is plastic. So if your starting on a budget and maybe want to upgrade your gun as you go, this is the PERFECT gun. Unlike most throw away plastic guns this one performs well out of the box and when it breaks (and all plastic guns do!) atleast it can be fixed! Great job Dboys!"