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Mk. II (HE - M3/M5/M6)
The Mk. II is a fixed, 37 mm, base-fuzed, high explosive fragmentation (HE-frag) cannon round, or simply HE in US terminology of the time, which replaced the earlier Mk. II HE-frag round. The Mk. II is used with the M3 series of 37 mm anti-tank guns and the M5 and M6 series of 37 mm tank guns. The Mk. II round would be replaced by the later M63 HE-frag round. The projectile used by the Mk. II is the same as that used with the Model 1916 gun...
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