this first came out as a millitary test weapon in the early 1980's. The prototype version had an eight round drum and was called the MM1 Multiround Projectile Launcher and it fired ANYTHING that you could get in a 12 gauge casing including slugs, crowd dispersing rounds (gas, rubber pellets, flash grenades) and high explosives. set to full auto it was quite a handfull apparently. It was claimed that with the right selection of ammunition one man could effectively put down a crowd of 100 people.