The M4 Automatic Gun is an American 37mm anti-aircraft autocannon employed during World War II, primarily as main armament of the Bell P-39N Airacobra. Designed and produced by John Moses Browning various manufacturers, including the famous Browning Arms Company, it was a versatile and reliable autocannon known for its effectiveness against both aerial and ground targets. Its accuracy, rapid fire rate and firepower contributed to its success in defending against enemy aircraft, and it was mounted on various vehicles, as well as utilized as a naval anti-aircraft gun.

M4 Automatic Gun
Autocannon
Abilities
Common Attributes - Mechanical
Auto
This weapon is fully automatic, either inherently so or by the presence of a selective-fire mechanism.
EFFECT:
This weapon can fire more than one shot each time it is used. Each subsequent shot has a progressive penalty.
Automatic weapons are considered STABLE when they're mounted on a vehicle, tripod or turret. This is different from the Stabilised SA.
- Point Blank Range - No penalty.
- Close Range (≤10m / 2sq) -> -1
- Short Range (≤50m / 5sq) -> -2 (STABLE: -1)
- Average Range (≤200m / 10sq) -> -3 (STABLE: -1)
- Medium Range (≤500m / 20sq) -> -5 (STABLE: -1)
- Long Range (≤1000m / 50sq) -> -5 (STABLE: -3)
~ Beyond this point, automatic fire is unfeasible without a STABLE firing platform. ~ - Very Long Range (≤2000m) -> (STABLE: -3)
- Extreme Range (>2000m) -> (STABLE: -5)
Belt-Fed
EFFECT:
This weapon is not fed from fixed capacity magazines, but from belts which can be made as long or short as needed.
Most machinegun belts contain 50, 100, 200 or 250 rounds. Some vehicle belts, however, can be way longer.
Unless specified otherwise, assume all small arms belts to be of 100 rounds.