No it's a good choice to focus on the M4 or AK platform. They're great guns.
Also note that there are some developments in Airsoft (you can't see it and I don't think we can tell you because you're not AV'ed) but basically look out for cheaper/more reasonably priced guns in about 3-4 months time.
EDIT: As for wobble, all you need to do is get some loctite and a hexkey or w/e. Other options include a free float system to take off weight from the barrel and a few other "fixes".
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE