help po !! give me some idea , upgrade may unit pl

[chiwawa]

sir beginner palang me
ask lang me about sa upgrade

may unit ako ma m4 s-system(370 FPS)

ano po maganda unahin bilihin para pang upgrade ng unit
gusto ko kasi pataasin ang chono or FPS nya

bigay naman idea by step-by step pls pls pls

[9th]

Brand?
Still stock setup, plastic bushing?
Maximum fps you want?






and what the purpose of the poll?