Description

12.7×108mm Ammunition Overview

The 12.7×108mm is a heavy machine gun and anti-materiel rifle cartridge developed by the Soviet Union in the 1930s. It is equivalent in purpose and performance to the NATO .50 BMG (12.7×99mm) round but slightly longer and used primarily in Eastern Bloc and post-Soviet states.

Technical Specifications

• Caliber: 12.7 mm

• Case Length: 108 mm

• Overall Length: ~147.5 mm

• Bullet Weight: ~48-60 grams (varies by type)

• Muzzle Velocity: ~800–900 m/s

• Muzzle Energy: ~15,000–18,000 joules

• Case Type: Rimless, bottleneck

Common Variants

1. B-32 (API):
   Armor-Piercing Incendiary — hardened steel core with incendiary composition, capable of penetrating light armor and igniting fuel or ammunition.

2. BZT-44 (API-T):
   Armor-Piercing Incendiary Tracer — like B-32 but with tracer element to visually follow trajectory.

3. BS (APHC):
   Armor-Piercing High-Capacity — with tungsten carbide core for superior armor penetration.

4. MDZ:
   High-Explosive Incendiary — designed for air targets, detonates on impact.

5. ZP:
   Incendiary Tracer — primarily for targeting and spotting.

Platforms

Used in:

• NSV, DShK, Kord heavy machine guns

• Yak-B rotary cannon (on helicopters)

• Anti-materiel rifles such as the KSVK, OSV-96, and others

Applications

• Anti-personnel and anti-material use

• Light armor penetration

• Air defense (low-flying aircraft, drones)

• Sniper and long-range interdiction

Countries Using It

• Russia and most post-Soviet states

• China (Type 54 HMG)

• North Korea, Iran, Serbia, and many others who use Warsaw Pact-era weapons.