Gaming pc for less than 400 dollars

Hi guys! I'm planning to join pc gaming and I'm on a budget of 400 US Dollars. Could you help me choose the part for my build within my budget? Thanks.

http://pcpartpicker.com/p/1cWc7

didnt know if you needed a copy of windows so hear is what i came up with im sure someone wll make something much better!. i didnt add a optical drive but you could always add one for like $10 or uses an old one if you have one lying around.http://pcpartpicker.com/parts/partlist/

Thanks a lot dude!