airsoftot

Physical adaptations to your play style, yes. Spunking money on chasing performance to the nth degree, no.
 
Unless you just want to tinker and you enjoy that, in which case more power to you!
 
That said, if it's your only gun then do the basics and then get out and play more. Save up and buy a speedyboi SSG1 and THEN start tearing into the CM16 (assuming that by that point you still want to be doing the whole Dye mask, SpeedQB thing of course).

G&G  polymer is some of the best you can get.

Cheers I'll have a look into that. £30 for a barrel and hop up doesn't sound too bad.
 
I've had the inner barrel and hop up out.. they were a little greasy so cleaned that off will try some iso