[CaptainHaplo]

So are some german chicks.....

I prefer the chicks hot - over here "hot" can also mean stolen, and I prefer to avoid dealing with stolen firearms..

Still - I get your point and would have to say - totally sweet!

To answer - yes a firearm gets hot. Friction in the barrel and all that.
You can melt the barrel of any firearm if its fired too much. It really depends on the number of rounds that it takes before you start having issues and how rapidly those rounds went downrange.
An M16 for example, on auto (the early ones had a setting for such) can chew through rounds like nobody's business. With adequate magazines and a skilled operator, you could make the thing inop. But that takes a while.
I suspect that with the # of issues they have seen, the problem is arising too quickly.

Do you have a link that shows how many rounds and in what time frame this is occuring?