The M320 Grenade Launcher Module is a single-shot 40mm grenade launching system used in the United States Army. It was developed to replace the M203 and has been in use since July 2009.
The M320 is a relatively small piece of equipment, weighing only 3.3 lbs and measuring 13.7 inches in length. It has an effective range of 150m with a maximum range of 400m. It is composed of three major parts: a grenade launcher, Day/Night Sight (DNS), and a hand held Laser Range Finder (LRF). The M320 can be used in two ways – attached to the M16 assault rifle or the M4 carbine, or it can be used as a stand-alone model. When used in conjunction with the M16 or M4, it’s attached under the barrel in front of the magazine.
The DNS allows the soldier to effectively engage the enemy in all types of light. The M320 has sights located on the side of the launcher, which makes it easier to aim the grenade launcher when attached to a weapon. It is capable of firing high-explosives, smoke, and illumination grenades. It can also discharge non-lethal ammunition when necessary.