The Metal Storm Multi-Shot Accessory Underbarrel Launcher (MAUL) is a lightweight 12 gauge gun system that attaches to the barrel of the M4 and M16 Modular Weapon Systems (MWS). The MAUL uses Metal Storm's stacked round firing system to allow four shots to be simultaneously loaded in a single chamber to maximise mission effectiveness.

Traditionally soldiers have carried separate weapons to perform door-breaching and less lethal force missions. The MAUL, which attaches to the primary weapons Picatinny rail, allows both missions to be performed by a single weapon system with minimal weight overhead.

Originally developed as a door-breaching capability, the 12- gauge MAUL is capable of firing both lethal and less-lethal munitions. It is bore sight aligned to the host gun sighting system.

Constructed from carbon fibre with a steel barrel the MAUL weighs only 2.75 pounds. Because there is no conventional mechanical action, the MAUL exhibits superior performance over other 12 gauge guns and operates over a wider range of climatic conditions.

The MAUL is powered from a single, common stock, military grade lithiumion battery and will provide months of use from a single cell.

• Door breaching capability
• Improved firepower to weight ratio - at 2.75 pounds, the MAUL is the lightest multishot accessory shotgun available.
• No moving parts - Metal Storm guns have no moving parts for high reliability.
• Safe operation - The MAUL features a number of mechanical and electrical interlocks making it one of the safest guns to operate.
• Cost effective - The MAUL is inexpensive to acquire, use and maintain.
• Lethal/less-lethal in one weapon
• Boresight aligned
• Standard battery - off the shelf