The FN Five-seveN AP is a selective-fire 5.7x28mm handgun by FN Herstal. Changes from the original Five-seveN include a select fire switch with semi, three-round-burst, and full-auto fire modes, an extended barrel with a flash suppressor, and an altered magazine. The magazine's bottom plate and spring can be quickly removed, and a fifty round P90 magazine can be attached underneath, for a total of seventy rounds. A butt-stock can then be placed at the rear end of the P90 magazine. A variant exists with a retractable stock that is attached to the gun, and not the P90 magazine. The Five-seveN AP fires at 1100 RPM.