It does have the plastic feel to it but I don't mind it so much. It's so fun to shoot 28 rounds of 22lr out of it, I tend to forget that it's made of polymer.
If the polymer upper really bothers you, you could always buy this kit and just swap it out with an aero precision one. Another member has done this and said that it works.
Another option is to maybe try and build one yourself with the cmmg drop in kit from Questar ($200), a cmmg barrel from Brownells ($99). aero precision upper from ArmsEast ($115) plus an upper parts kit ($?).