User blog comment:Redkite/Two New Ideas/@comment-70.242.114.76-20120630233203/@comment-1990578-20120701004624

Cuz it has two functions. Reducing left/right (and vertical on LMGs and semi-auto snipers) recoil when on the move, and allowing you to set-up your weapon for almost no recoil at the cost of no movement. It'd be only fair. Otherwise, it'd be OP as fuck combining the two abilities and allowing another barrel attachment unless it performed nowhere near as well as just a bipod or just a foregrip alone.