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53-UBR-281U
The 53-UBR-281U (53-УБР-281У) is a nominally 57 mm, Soviet-era-developed, armour-piercing, capped, ballistic-capped, high explosive tracer (APCBCHE-T) round. The 53-UBR-281U round comprises the 53-BR-281 (53-БР-281У) APCBCHE-T projectile and the 54-Zh-281 (54-Ж-281) charge system. The improved 53-UBR-281U round replaced the older 53-UBR-281 (53-УБР-281) round many years ago. As such the newer round is far more likely to be encountered. P...
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