For $300-$400 grab a G&G. Then you'll have some cash left over for batteries, a charger, mags, ammo, a sight, some minor upgrades (start with an R-Hop), etc.
There's no perfect gun in that price range, but this is a good start.
ďREALITY IS LIKE A STONE. TO MANY ITíS HARD AND COLD, THEY CANíT HUG IT OR EAT IT, IT ONLY FRUSTERATES THEM AND DOESNíT DO THEM MUCH GOOD. TO OTHERS ITíS STRONG AND DEPENDABLE, YOU CAN BUILD WITH IT, BUILD UPON IT, OR WORK WITH IT, ALSO USE IT TO SMASH PEOPLE IN THE FACE.Ē