I was thinking the other day that while the Destiny weapons are pretty awesome, many of them aren't very futuristic! So I took a page out of Heinlein for this weapon...

The main perk to this gun would be Smart Rounds, which work much like the tracking rockets from Truth. Critical shots would be somewhat difficult because the machine gun would have very low stability, but due to the smart rounds you wouldn't really miss unless at very close range. The other perks would allow you to reduce the impact for better tracking or increase the impact but reduce the tracking.

Sooooo...the ZF1, then?

The Shock Rifle. It's already in the game, but we're not allowed to use it.