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M54 (HE-T-SD - M1/M9)
The M54 was a fixed, 37 mm, nose-fuzed, high explosive tracer self-destruct (HE-T-SD) cannon round, or simply HE in US terminology of the time. The M54 HE-T-SD round was used by 37 mm M1 series of anti-aircraft guns and the M9 (AN-M9) aircraft cannon. Other known rounds in the family are: M54A1 HE-T-SD; M55A1 target practice tracer (TP-T); M59 armour piercing capped tracer (APC-T); M59A1 APC-T; the M74 armour piercing tracer (AP-T); and M80...
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