Tokyo Marui MWS Zet GBBR M4 Airsoft Recommended First Upgrades

If you want the tldr, the essential recommended upgrades out of the box are: 1) Enhanced Nozzle Return Spring 2) Hop Up Nub, Arm 3) Aluminum Buffer 4) One Piece Buffer Tube, Red Loctite Stock Buffer Tube End Cap Side Notes: Stock nozzles are best imo. Stock bucking work great, I also like modify tan. Stock barrels are very accurate, but swapping to a tighter bore or longer barrel can increase fps if that is a goal. Another option is npas valves. Parts Recommendations: 1) Dynamic Precision, G P, all others should work. However the Guns Modify spring is really short and a pita to install fyi. I dont recommend them due to difficulty of installation. 2) Six G brass concave spacer, Wii brass concave spacer, Wetech brass concave spacer (any hard type concave spacer should work), or Laylax mws hop up arm 3)G P V1 Aluminim Buffer (make sure its for the stock tube diameter and not their own as its wider and wont fit the stock tube). They also s