The speed at which a projectile travels, usually given in meters per second (m/s).
Muzzle velocity refers to the velocity of a projectile as it leaves the barrel or muzzle device.
The ballistic coefficient (BC) of a body is a measure of its ability to overcome air resistance in flight. It is inversely proportional to the negative acceleration: a high number indicates a low negative acceleration — the drag on the body is small in proportion to its mass.
Or in simple words: the higher the value, the better the flight characteristics and the less energy loss over the distance.
More details on Wikipedia
Specifies the number of health points that are deducted when a body part is hit. If a body part has less health points than is deducted, the excess damage is distributed to other body parts.
Is given in absolute or relative numbers.
If absolute, then it indicates the number of durability points that are deducted when the projectile hits the armor.
The damage passed through to the part of the body protected by the armor if the projectile does not penetrate.
Indicates the ability of ammunition to penetrate body armor or, to a lesser extent, world objects.
Indicates the probability of penetrating armor.
Indicates the probability of a projectile fragmenting in a body. The number of fragments varies from ammunition to ammunition. Each fragment deals 50% additional damage to the part of the body that is hit.
Note: Currently, ammunition does not fragment if the penetration power value is below
Indicates the class of the armor. Armors are divided into 6 different classes, of which 6 is the most resistant class.
The material indicates the destructibility and reparability of armor.
It indicates the armor’s resistance to external damage.