I see... I missed that in the original post.
Anyways, as to the metal vs plastic. Metal is nicer but plastic is good enough IMO unless you're really rough with your stuff. Plus your first gun isn't your last. If you decide you want something metal then after a season or two sell your current gun to another newbie getting into the sport and and buy something new. It's not like a plastic gun is going to spontaneously catch fire and explode (that is unless you get an electrical short, but that will still happen to a metal gun if there's bare wires or whatever).
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE