MQ-9「收割者」（MQ-9 "Reaper"，又译「收割者」，原代号称为「掠夺者B」（Predator B）），是一款由通用原子航空系统（General Atomics Aeronautical Systems, GA-ASI）为美国空军所开发的无人机。MQ-9是由MQ-1掠夺者式改进而成的高端机种，但尺码更大、载重更重，具有长滞空时程、高海拔监视的能力，有别于前代机种原本是开发作为侦察用途但转用于主动攻击目标，MQ-9是第一款专门设计作为猎杀用途的无人机。另外，尽管机身性能上有差别，但MQ-9与MQ-1仍共用相同的控制接口。

A typical MQ-9 system consists of multiple aircraft, ground control station, communications equipment, maintenance spares, and personnel. A military crew comprises a pilot, sensor operator, and Mission Intelligence Coordinator. The aircraft is powered by a 950 hp turboprop, with a maximum speed of about 260 knots (300 miles per hour or 483 km per hour) and a cruising speed of 150–170 knots (170–200 mph; 280–310 km/h). With a 66 ft (20 m) wingspan, and a maximum payload of 3,800 lb (1,700 kg), the MQ-9 can be armed with a variety of weaponry, including Hellfire missiles and 500-lb laser-guided bomb units. Endurance is 30 hours when conducting ISR missions, which decreases to 23 hours if it is carrying a full weapon load. The Reaper has a range of 1,000 nmi (1,150 mi; 1,850 km) and an operational altitude of 50,000 ft (15,000 m), which makes it especially useful for long-term loitering operations, both for surveillance and support of ground troops.