TweetNO flame but
you look like 160pounds at 13%bf in that pic...NO WAY your benching 315x6...
I mean your chest is NOT LACKING compared to rest of your build youre just small all over(if i had to pick one muscle i would say forearms are lacking). The only advice i can give you is to start working out seriously...there is so much information on the net just read and learn the basics.
sorry if it sounded like a flame or anything