There are some pretty high quality paintball guns that you can get and continue with paintball... all with the realism of a the weapons they represent including the clip feeding magazines... there's also a lot of thing you could do for you paintball gun to make it more accurate...like get a longer barrel, or a rifled barrel, then there's the really costly option of the paintball version of hop up...
list goes on and on. check out guns like Tactmark or do a search for magazine feed markers... costly, but a good alternative until you turn 18. Then sell your paintball gear, get some airsoft guns and come out to play
TM VSR10 Gspec; WA 1911 series 70; WA M1911