throughout the 1950s and 1960s.

The U.S. Navy was one of the last users of the Mk 2 when it was finally withdrawn from U.S. military service in 1969, replaced with the M33 series (M33/M67).

Design

The Mk 2, like the Mk 1, was manufactured of cast iron with a grooved surface divided into 40 knobs in five rows of eight columns.

This was intended to enhance fragmentation