Originally Posted by TokyoSeven
If you find your gun a little noisey you should have the gears reshimmed and possibily the motor height adjusted, also since your mechbox would be open I would suggest replacing the bushings in your mechbox with metal one if they are not there already. I would not recommend doing this unless you are confident around a mechbox.
A new hopup and barrel would be the simplest upgrades without having to open the mechbox. Although if you do switch to a 1 piece hopup modifacation too the reciever will be required. As for what brands I will leave the decision and the research up to you.
Thank you for the tips TokyoSeven. A fellow airsofter recommeded that I get the Systema Silent Cylinder Set. Btw, when I change to a one piece hopup i need to change the receiver of my JG HK416 also? Im planning to get the CA one piece hop up and the madbull tight barrel.