AA-4 - Definition

The Mikoyan-Gurevich K-9 (NATO reporting name AA-4 'Awl') was a long-range air-to-air missile developed by the Soviet Union in the late 1950s. It was also known as the K-155, and would apparently have had the service designation R-38. It was intended to arm the MiG Ye-152A (NATO reporting name 'Flipper'), an experimental twin-engine version of the Mikoyan-Gurevich MiG-21. When the Ye-152A was shown at Tushino in 1961, a prototype of the K-9 missile was displayed with it.

Neither the 'Flipper' nor the 'Awl' ever entered production.