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53-O-271U
The 53-O-271U (53-О-271У) is a Russian 57 mm high explosive fragmentation (HE-frag) projectile. The 53-O-271U is normally seen marked up with its short form designation of O-271U (О-271У), and not its full GAU (later GRAU) index code. The 53-O-271U forms part of the 53-UO-271U (53-УО-271У) round, which is fired by weapons, such as: the Ch-26 (Ч-26) towed anti-tank (AT) gun; the Ch-51/Ch-51M (Ч-51/ЧЧ-51М) guns of the ASU-57 (АСУ-57) self-pro...
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