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M57 (Defensive Hand Grenade)
The M57 is a US-developed, high explosive (HE) controlled-fragmentation, defensive, impact and delay fuzed, hand grenade, which is based on, and almost identical to, the M26A2 grenade. Construction The M57 comprises a two-part, thin, sheet steel-walled outer casing, which forms an ovoid body that holds an internal notched wire fragmentation coil liner and high explosive filling. The top of the M57's body has a strengthened threaded fuze...
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