How to get the MG-42 in the arena?

[MCubed]

Usualy in the first round a blue floating MG-42 appears in the arena up in the stands, I have no idea how to get it. I thought since it was the most powerfull arena weapon (presumably) I figured I needed tons of points to get it down.

Well, after beating 20 rounds using takedowns only for maxiumum points it still floats up there. I must be doing something wrong.

How the hell do I get it down? Somtimes the crowd throws some other crappy gun like the full auto shotgun thing, and it falls right into the arena for me to collect. What am I doing wrong to get the MG-42?