he's a cute pup thats for sure. but if he really is razors edge then hes not a pit bull, he's an american bully. AmBully is an up and coming breed that was started by crossing the american pit bull terrier with the american staffordshire terrier. but if u have papers and his blood line is really razors edge then he is considered an AmBully. we have lots of great info in the Bullies 101 section.
but welcome to the site, there is much to learn! stick around though, would love to see this boy grow up!