Colt M203 grenade launcher

The  M203 grenade launcher is a single shot 40mm grenade launcher able to be attached to most M16 rifle variants or to a stand alone stock.

The low-velocity 40mm rounds fired by the weapon are capable of piercing the armor of a Death glider if an impact can be made. Several types of grenades are available including high explosive (HE), high explosive dual-purpose&mdash;for armor penetration&mdash;smoke, flare, and others. Most 40mm rounds have an explosive effect producing a casualty radius and have a safety build into the fuze to prevent them from detonating too close to the firer.

In spite of being comparatively heavy, the projectiles are slow and can often be seen in flight. Accuracy often depends on practice and experience. An advanced technique is to fire the weapon at a high angle creating a mortar-like effect.

Col. Jack O'Neill has been known to carry the stand-alone version and several grenades on occasion, using one to shoot down a Death glider. Col. Dave Dixon employed an M203 attached to a carbine to drop a wall on a [[Reconnaissance probe | Goa'uld reconnaissance probe, destroying it.