Engineering:M243 smoke grenade launcher
From HandWiki
The M243 smoke grenade launcher uses rounds filled with red phosphorus. Upon activation, a dense cloud of white smoke is created from ground level up to a minimum height of 7 metres and between 20 and 50 metres from the vehicle in 2 to 6 seconds. The cloud lasts 1 to 3 minutes depending on wind speed and other weather conditions.
See also