I have an AK for sale, if you can get someone over 18 it would be the best starter gun you can buy for the money (I believe many members would agree with me), and if you're buying through NIA, I'll make sure you're setup with everything you need to play with us.
Horton is correct in that being a sniper is a really really bad idea, but incredibly common in novice players, no offence
PS. $300 gets you my gun, charger, battery, mags, bag for the mags, sight, and sling. Check the ad section, guaranteed best price you'll find anywhere.