About 6 months ago Metal Storm was awarded AU$1.4 million in development contracts from the US Navy to develop a 12 guage (.729″ caliber, not the 12 gauge shotgun cartridge) multishot weapon that mounts under an M16 and M4.

The MAUL has no moving parts and weights just 2.75 pounds.

All four rounds can be loaded into the chamber at once and are electronically ignited. It can fire lethal rounds, such as grenades, and non lethal rounds.

The weapon system was exhibited at AUSA Expo this year and should be in production next year.