The U.S. Air Force MQ-9 Reaper remains the frontline armed drone. Designed to be a follow-up to the MQ-1 Predator, the Reaper can carry a great deal of ordnance, which allows it to fulfill the « hunter » component of a hunter-killer drone. Reapers can carry double the amount of Hellfire missiles that the Predator could carry, while the MQ-9 can also carry up to 500 pounds bombs.
Source : Is the U.S. Air Force Developing an Autonomous Killer Drone?