The RPG-18 is a anti-tank rocket launcher that appears in Conflict: Global Terror.
The RPG-18 was adopted by Soviet army in 1972. Most probably, its development was inspired by US-made M72 LAW disposable anti-tank weapons, which saw significant use during Vietnam war. Indeed, the RPG-18 bears more than passing resemblance to the M72 LAW in its design and appearance. The RPG-18 was produced for Soviet (and later Russian) army up until early 1990s, and is now obsolete.
Conflict: Global Terror
RPG-18 first appears in Egypt, and is since then used by all enemies who have rocket launchers. It is incorrectly shown as reusable.