| Features: The M203 40mm
is used while attached to an M16A2 5.56mm rifle. It is a lightweight,
compact, breech loading, pump action, single shot launcher. The
launcher consists of a hand guard and sight assembly with an adjustable
metallic folding, short-range blade sight assembly, and an aluminum
receiver assembly which houses the barrel latch, barrel stop and firing
mechanism. The launcher is capable of firing a variety of low velocity
40mm ammunition. The launcher also has a quadrant sight which may be
attached to the M16A2 carrying handle and is used when precision is
required out to the maximum effective range of the weapon.
The M203 was designed and procured as the replacement for the M79
grenade launcher of the Vietnam era.