I had one with full auto and explosive rounds. It was a Dead Orbit SR from the HOW era. I can't recall the name ATM.
Edit: Dead Shot Luna maybe??
It absolutely melted, I loved that thing.
Double edit: sorry for double posting, figured it had been enough time, thread is at a crawl.
Yeah, I had one of those too but if I remember correctly recoil was pretty bad, I also had an NL Shadow from back then that was Full-Auto with Explosive Rounds that was fun to use.
I only need a handful of Milestones to complete the AoT book but while I consider the King's Fall raid the most complete experience with interesting encounters the only piece of gear/weapon I liked was the machine gun which I already have so I think I'm going to skip that one. If I do anything it be the Oryx encounter specifically as I always enjoyed it.
Really, none of the primary weapons from KF or WotM interest me, elemental or not. Maybe an elemental Genesis Chain~ but not much else. I'm assuming they're going to add elementals to these weapons now, right?