37mm Nose Cannon

The COW 37mm gun was an early large caliber aircraft weapon trialled by the British in WW1. It was tried unsuccessfully in several aircraft and in mountings on the ground.

In-game
In Battlefield 1, the 37mm Nose Cannon appears as a weapon available for Attack Planes with the Tank Hunter package. The 37mm Nose Cannon fires one shot at a time which causes significant recoil to the aircraft firing. Additionally, the cannon has significant drop which must be accounted for. That being said, the 37mm Cannon does much more damage to tanks than any other weapon available for the attack plane.