US Projectile, 81mm Chemical, M57




The 81 millimeter mortar round was long and cylindrical in shape with a tapered nose and tail. It had a bourrelet machined on the body near the base of the round which acted as a rear bearing surface and a gas check. There were three raised portions near the nose to act as a forward bearing surface. The nose was machined and threaded to receive an adapter.

See Also

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Old Chemical Weapons and Related Materiel Reference Guide (2018)

Old Chemical Weapons Reference Guide (1998)