Found this on the web of an Aussie attempt at a AICW [advanced individual combat weapon]
by the metalstorm co. on...................
Metal Storm Limited - Electronically initiated 'stacked projectile ...
The AICW is an integrated weapon concept which combines a standard 5.56mm Steyr assault rifle and a Metal Storm 40mm grenade launcher in a single unit with a common trigger, laser sight and control system that operates both the 5.56mm and the 40mm barrels.
The benched test firing demonstrated the AICW’s ability to switch between 5.56mm and 40mm barrels instantly and without reloading. The 40mm barrel incorporates the Metal Storm electronically initiated “stacked munitions” system and can fire three rounds before re-loading is required.
The Americans have been working on a AICW for some years, but I think it's been shelved.
by the metalstorm co. on...................
Metal Storm Limited - Electronically initiated 'stacked projectile ...
The AICW is an integrated weapon concept which combines a standard 5.56mm Steyr assault rifle and a Metal Storm 40mm grenade launcher in a single unit with a common trigger, laser sight and control system that operates both the 5.56mm and the 40mm barrels.
The benched test firing demonstrated the AICW’s ability to switch between 5.56mm and 40mm barrels instantly and without reloading. The 40mm barrel incorporates the Metal Storm electronically initiated “stacked munitions” system and can fire three rounds before re-loading is required.
The Americans have been working on a AICW for some years, but I think it's been shelved.