I suggest a KA M4. They can be had for about $300-350. You will also need a new spring which will cost you a whopping $10. With the remaining money your next two priorities are good eye protection then boots.
If you don't already have mags, batteries and gear then your budget of $500 may be a bit light but still doable if you shop around in the classifieds for deals.
Edit: I just found a place that carries them for $260 plus shipping.
Originally Posted by Pinard
eeyore, the more I look at your avatar, the more I find it looks like a vagina...
Last edited by Eeyore; March 19th, 2012 at 11:51..