The grenade launcher provides self-screening smoke capability. Twelve smoke grenades, fired
in salvo, produce a smoke cloud over a 110 arc in 2 seconds. The cloud is 26 to 33 feet (8 to 10
meters) high, 98 feet (30 meters), from the vehicle and lasts one to three minutes depending on
wind conditions. The grenade launcher consists of two British No. 9 Mark 1 smoke grenade
dischargers (1) with canvas covers, a smoke discharger pushbutton unit, two ammunition storage
bins, and an installation kit composed of mounting brackets, an arming switch, electrical wiring
harness, and exterior harness protectors.
Each discharger (1) is a six-barreled aluminum casting approximately 10 in. (254 mm) high, 15 in.
(381 mm) wide, 18 in. (457 mm) deep, and weighs 33 lb (15.0 kg). One launcher is bolted to a
bracket that is mounted on the left outside of the hull, the other on the right side of the hull.
Both dischargers are wired to launch grenades from alternate barrels upon activation of either
pushbutton on the smoke grenade discharger pushbutton unit. Activation of one pushbutton will
launch six grenades, three from each discharger. Activation of both pushbuttons simultaneously
will launch all twelve grenades. A single discharger barrel cannot be fired. The smoke grenade
screening pattern is shown in the following illustration.