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3BK21B
The 3BK21B (3БК21Б) is an exceptionally rare, Soviet-era developed, Russian Federation, 125 mm high explosive, anti-tank fin-stabilised tracer (HEAT-FS-T) projectile. Next to no information is available on the 3BK21B, though it is thought to use the VU-729 (ВУ-729) fuzing system and to have a uranium-based shaped charge liner. The 3BK21B projectile, if seen at all, would be marked-up in its short-form designation of BK21B (БК21Б), and not i...
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