The Armat Battlefield Systems M51A Bounding Fragmentation Round (also known simply as the M51A) is a type of bouncing fragmentation grenade predominantly employed by the United States Colonial Marine Corps.[1]
Overview[]
The M51A is primarily designed to be fired from the U1 Grenade Launcher, although it can also double as a hand grenade. The cartridge consists of two main sections — a rimmed, separating base and a metal casing topped with a blue plastic identifying cap. When fired from a U1, the base propels the casing from the grenade launcher's barrel. When the round impacts, a small charge propels it two meters into the air, where it airbursts for additional effect against troops in the open or in foxholes without overhead cover.[1]
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