When you go metal go with QUALITY.
Which means Classic Army, G&P, ICS, or VFC (etc).
That means no Chinese clones, or crappy "sport-line" AEG's.
I'm pissed at my G&G GR 16 (CAS 2008 Version). Charging handle pin snapped off ergo the charging handle isn't as nice as it once was. Bolt catch isn't functional, neither is the charging handle or forward assist
I recommend (maybe just for looks) that you get a gun with all of these functional, although not an EBB as the piston tends to strip easily on those models.
PS. A functional forward assist would return the spring to its usual position .
PPS. This would only work on a M4/M16 type AEG.