For something with some real "power", try one of these on for size...
DESCRIPTION: The MK-19 Grenade Launcher is a fully automatic weapon that fires 40mm grenades.
FEATURES:
The MK19-3 can be mounted on a tripod or a vehicle swivel point. The weapon delivers accurate, intense, decisive firepower against personnel and lightly armored vehicles by shooting a variety of 40mm grenades. Because of its weight, it is crew transportable only over short distances with limited amounts of ammunition. The MK19-3 shoots a 40mm grenade, which can kill in a 32-foot (5-meter) circle and wound in a 100-foot (30-meter) circle (48 feet). The grenade can penetrate two inches of armor.
Randy