Airsoft tip

[Hades]

Hi guys
now im sitting on needles and waiting for my airsoft package i ordered from hongkong Wargameclub
it should arrive to sweden tomorrow so in a few days i will get my armalite:)
i also have a place to the biggest swedish airsoft event Operation frost4
i was luckey the 350 places was sold out in 40 min i even think they have set it to be 400 now

my question is what is the first things i will need to upgrade? i ordered a m-100 spring and some bushings and stuff so the wep will have around 330-340 fps ithink it will do the first months untill i get used to the wep,
what is the next thing to get? aimpoint?, metall body? maybe the m4 hurricane body?
anygood advices is welcome.

Hades