Fragmentation Mk II, Mk IIA1; also Fuze M204
U.S. EXPLOSIVE ORDNANCE
PART 4 - GRENADES
Chapter 11 - HAND GRENADES

General

The design of hand grenades has been confined by several limiting techniclities, as follows: the grenade must be small and light; its range is short; there is no set-back or creep force of significance in the throwing operation; and the grenade must be rugged and safe enough to be carried on the bodies of troops.

Hence, despite the many tactical purposes - anti-tank, anti-personnel, screening, etc. - hand grenades are generally of the same shape, size, and fuze action.