Cabose, you make me think of the song "eve of destruction" when he say : "You'r old enough to kill, but not for votin'". The thing is, if you are in the reserve and you kill some one (maybe a friendly), you will not be responsible for it, the goverment will (but if you do kill a friendly, It's probably because you did an action not supported by the goverment).
So for underage airsoft wannabe like me, I'll give you one advice : buy your gear right now (like I did), so when you'll be old enought, you'll be ready. But please dont jerk around with it, you'll give airsoft a bad name.
Dragunov and Stolichnaya,
Smirnoff and Kalashnikov