Tokyo Mauri M4 S-System
 

Hi guys, i own a TM M4 S-System im new to upgrade guns, im wondering if im willing to upgrade my m4 what should i do first because the gun is kinda unstable to me atm trying to make it shoot better and all the rails and gear is kinda loose kinda shaking(is it normal?) the gun itself is pretty much all stock using 8.4v battery thanks guys!!much appreciated

Here is a list of upgrades that you can do in no particular order:

Prometheus Tightbore Barrel (Dont get their ASH lineup though)
ARS springuide
ARS Piston head w/ attached sorbo
ARS Cylinder head
Prometheus Hard Piston
Prometheus Soft rubber
Shredder concave spacer
New Spring (prometheus if you want)
Prometheus gears (torque up if you want better trigger response)

I'm pretty sure he was talking about his externals being flimsy.

yeah ...its like where the rail and the whole body of the gun is kinda shaky thanks for the list!