Spent 28 motes rerolling the lash, got one with outlaw, field scout and final round deals more damage. This last one could be better, but I'm pretty damn happy with it.
I think I will grind a bit to buy another one just to tinker with it, might get lucky. At this point, if I could replace the final round with Firefly or Reactive reload it would be so broken it wouldn't even be funny. But I'm happy with what I got. The gun is pretty damn cool and it was the first IB I cared enough to rank to 5. Lot a fun overall, except for the late night lag fests.
On another note, I got 2 IB auto rifles, one was kinda rubbish but the other had Reactive reload, perfect balance and crowd control so it was a productive night yesterday. I think it might be a fucking beast in the right hands