M203 Grenade Launcher
Damage: Varies
Range Increment: 70 ft
Rate of Fire: Single
Magazine: 1 int
Size: Medium
Weight: 4 lbs
The M203 is a single-shot 40 mm under-barrel grenade launcher designed to attach to a rifle, though standalone versions do exist. Though versatile, and compatible with many rifle models, the M203 was originally designed for the U.S. M16 and its variant, the M4 Carbine.
Wikipedia Entry