The Navy liked the Chukar I but wanted a somewhat faster version, and in the early 1970s Northrop developed the improved experimental MQM-74B, which was followed by the production MQM-74C Chukar II.
The Chukar II is difficult to distinguish from the Chukar I, but the Chukar II is slightly scaled up and uses an uprated Williams WR24-7 turbojet with 180 pound (800 N) thrust, giving it a top speed of 590 mph (950 km/h).

Like the Chukar I, the Chukar II is ground or ship launched only.
At least 1,400 Chukar IIs were built, mostly for the US Navy, but other customers included NATO, the United Kingdom, West Germany, Greece, Iran, Italy, Japan, the Netherlands, Saudi Arabia, and Spain.
The Navy liked the Chukar I but wanted a somewhat faster version, and in the early 1970s Northrop developed the improved experimental MQM-74B, which was followed by the production MQM-74C Chukar II. The Chukar II is difficult to distinguish from the Chukar I, but the Chukar II is slightly scaled up and uses an uprated Williams WR24-7 turbojet with 180 pound (800 N) thrust, giving it a top speed of 590 mph (950 km/h).
Like the Chukar I, the Chukar II is ground or ship launched only. At least 1,400 Chukar IIs were built, mostly for the US Navy, but other customers included NATO, the United Kingdom, West Germany, Greece, Iran, Italy, Japan, the Netherlands, Saudi Arabia, and Spain.
Northrop BQM-74 Chukar