[mikiec]

The M 60 is a hand carried machine gun firing a 7.62MM Nato round. Commonly called a Pig by the grunts that used it.

20MM Vulcan is a multi barreled cannon firing 20 MM rounds at a rate of 100 rounds a second.

Mini gun same type weapon as the Vulcan firing the 7.62 round at a rate of 6000 rounds per minute

Looking at your list I would still go for the Thompson.

Mike