The Nudelman-Suranov NS-37 is a Soviet 37mm autocannon which was used extensively during the Great Patriotic War due to its effectiveness against all air and ground targets, particularly bombers and armour. It was replaced at the beginning of the Cold War by the lighter and more modern Nudelman N-37.

Nudelman-Suranov NS-37
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.