Whats the best rifle?

AK is the most powerful, but to be honest, sometimes, depending on the situation, an M4 can actually overcome AK. I'm using M4A4 and its spray pattern is a lot easier than AK's, which makes it easier to have some spray duels. If you're going for juicy taps then AK+Deagle is your way to go. And ofcourse, an AWP is considered a rifle, trading mobility for more firepower.