The P-39Q-5 is an American fighter. It has been in the game since the start of the Open Beta Test prior to Update 1.27.

The primary purpose of a P-39 is that of a low-level interceptor against low-energy aircraft. It lacks the high-altitude performance needed to engage strategic bombers. The 37 mm M4's dropping trajectory and slow rate of fire make it useless in head-on passes. Therefore, prioritise low altitude objectives, like escorting attackers & low alt bombers, or preying on the ones of the enemy.

Compared to the P-39N-0, the Q-5 trades the four .30 calibre machine guns for another pair of .50 calibre machine guns in under-wing gun pods. Keep in mind that these underwing gun pods increase drag, wing loading, and decrease maximum speed in exchange for more firepower.