MAUL (weapon)

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MAUL shotgun.PNG
MAUL shotgun, mounted under a M4 carbine above and standalone below
Type Shotgun
Place of origin  Australia
Production history
Manufacturer Metal Storm
Variants module of rifle and standalone
Weight 0.8 kilograms (1.8 lb)

Cartridge 5 round stacked projectile munition tube
Caliber 12 gauge
Action semi automatic
Feed system stacked projectile

The Multi-shot Accessory Underbarrel Launcher, or MAUL, is an ultra-lightweight semi-automatic shotgun manufactured by Brisbane-based company Metal Storm.[1] A range of lethal: buckshot and slug, and non-lethal: blunt impact, door breaching, and frangible munitions come preloaded in 5 round "stacked projectiles" munition tubes. With a 12-gauge bore and weighing less than 800 grams (1.8 lb), it is designed to be used as an underslung module of a combat rifle such as M4 or M16, but may be used as a standalone[2][3]

MAUL uses Metal Storm's patented stacked round system to eliminate the mechanical action associated with conventional 12 gauge weapons. Operators can load up to 5 rounds in less than 2 seconds, and fire repeatedly without cycling a conventional action. When used as an underslung complementary to the primary weapon, the MAUL is aligned to the host gun sighting system, providing a choice of munitions using only the single sighting system.

For military operations, the underslung MAUL is designed to expand the mission capabilities of a weapon while having minimal effect on the weight and balance of the primary weapon. MAUL provides instantaneous access to door breaching, non-lethal force and also a backup lethal weapon if primary weapon fails.

For law enforcement operators, the underslung MAUL adds non-lethal, shotgun and door breaching capabilities to a conventional weapon system while the optional lightweight shoulder stock and pistol grip attachments allow for an ultra-lightweight stand-alone 12 gauge weapon if desired.


The MAUL is designed for wide ranging uses in military and law enforcement operations

  • Military Operations in Urban Terrain (MOUT)
  • Door breaching and room clearing
  • Complex security missions - mixed civilian and hostile personnel
  • Law enforcement and border security
  • Crowd control missions


  • 5 shot semi-automatic 12 gauge weapon
  • 800g (1.8 lb)
  • Under-barrel accessory, standalone shoulder stock or pistol grip configurations
  • Lethal, non-lethal and door breaching munitions available
  • Reload speed - up to 5 rounds in under 2 seconds
  • Non-cycling operation

Advantages over conventional weapons[edit]

  • Expands mission capabilities of every operator
  • Range of door breaching, non-lethal and lethal munitions offer broad capabilities for complex missions
  • Negligible impact on weight and balance of primary weapon
  • Provides backup lethal weapon if primary weapon fails
  • Loaded munition type can be swapped in under 2 seconds
  • Eliminates audible cycling signature
  • Eliminates most points of failure common to conventional weapons
  • Stand-alone shoulder stock or pistol grip available for personnel not carrying an assault rifle


  •  Papua New Guinea: As of 3 August 2010, Metal Storm have signed a contract with the Correctional Services Minister Tony Aimo to supply 500 stand alone MAULs and 50,000 rounds of less lethal ammunition for use by correctional services officers;[1] As of January 2011, this contract was awaiting ratification from the PNG government.


  1. ^ a b "Metal Storm win multi-million contract". The Sydney Morning Herald (Fairfax Media). 3 August 2010. Retrieved 3 August 2010. 
  2. ^ "MAUL". Metal Storm website. Metal Storm Limited. Retrieved 3 August 2010. 
  3. ^ "MAUL – Multishot Accessory Underbarrel Launcher". Marines magazine. United States Marine Corps. 5 April 2010. Retrieved 3 May 2010.