Try the Fist of Crota mission. There's a knight close to the starting point that drops Husk of the Pit. It's a lot faster than waiting 15min for another chance when you could just kill> orbit> go back down and kill it again.
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I keep getting this silly weapon. I've got one maxed(Eidolon ally) and like six or seven in my vault and inventory. Plus I've dismantled a few. RNG won't bless me with Ghorn but stuffs me with Husks... And this gun doesn't worth the fuss. It's impact is atrocious...