The MK 103 is a German 30mm autocannon developed in parallel to its smaller sibling, the MK 108 as a dual-purpose anti-air and anti-tank weapon. It served in the latter half of the Second Weltkrieg, particularly with high-performance fighters and attacker aircraft. By using HEHC Shells (or minengeschoss in Luftwaffe service) ammunition, the MK 103 achieved disproportionate firepower in comparison with other autocannons of the era.

MK 103
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.