Manville Gas Gun

The MANVILLE GAS-GUN 12 is a strange shotgun; it can fire less-than-lethal or normal ammo; it was used by the National Guard during the Terre Haute Riots, and it appeared in THE MATRIX (it appeared "akimbo" in the hands of a young rebel, killed by the SWAT in the "deja-vu" building, remember it??

Picture from Giovanni Tendas