40mm Smoke

40mm Smoke ammunition is designed for use with a grenade launcher. On impact, it creates a thick gray/white cloud of smoke.

Battlefield: Bad Company 2
The 40mm Smoke Launcher is a gadget available for the Assault kit in Battlefield: Bad Company 2 that allows the player to fire smoke grenades from a 40mm under-barrel grenade launcher.

It is recommended to use the expanded grenade capacity in Battlefield: Bad Company 2 (which also helps because smoke grenades resupply faster than normal Frag grenades).

A lesser-known use is the ability to disable and remove tracer darts.

The UAV-1 can be equipped with 40mm smoke as a specialization. If aimed properly, it too can be used to kill infantry.

Battlefield 3
Smoke rounds (M320 Smoke) are available for the M320 grenade launcher as its final unlockable ammo type.

As of the beta, players can carry up to six rounds.

Trivia

 * In BFBC2, the 40mm Smoke Launcher shown on the equipment main menu is in fact a Russian GP-25 grenade launcher.
 * Weapon stars are not awarded for kills earned with the smoke launcher.

Videos
thumb|300px|left|Gameplay with the 40mm Smoke Launcher on various assault rifles at [[Harvest Day and Oasis]]