hi, i am new to airsoft (i am playing paintball sine 15 years) and i would like to get somme wisdom poured on my newbi head! loll
my tm hi-capa 5.1 is in the mail!

so i would like to upgrade it whit every parts that will make it more perfomant (dont really need more fps becose i will be shooting a people up close in cqc )and more estetic.
it will be used a lot (not for display) so i will need good components.
oh and please, if you tell me to buy a part, please explain me why i should (what it does to the gun)
edit* i will run it on propane!
thanks
p.s. is there some danger shooting up close whit a gbb, we play whit paintballs going at 280 fps and we shoot at close range (1 feet away)
can i do head shot whit it or is it too dangerous(we ware gogles)?
thanks