US Cartridge, 120mm Smoke WP, XM929




This cartridge is a smoke, white phosphorous (WP) round developed for use in the M120 and M121 120mm mortar system. It is intended for use as an incendiary device and to produce a screen.

The complete round consists of a fuze, propellant charge, fin assembly, ignition cartridge, and shell body. The shell body, made of wrought carbon steel, is loaded with WP filler. The ignition cartridge has a percussion primer and is assembled to the end of the fin assembly. The propellant charge is contained in four horse-shoe-shaped felt fiber containers and assembled around the fin assembly shaft.

See Also

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Collaborative Ordnance Data Repository

Iraq Ordnance Identification Guide (2004)

TM 43-0001-28, Artillery Ammunition (chg 11, 2003)