It's too bad about the origin trait for these previously cut Black Armory weapons. I hope they aren't too circumspect with the strength of the perk after they fix it, otherwise I fear the weapons are washed. Unless, of course, someone finds a cheese.
Forgeskin seems to be bugged and doesn't give any damage buff with any number of BA weapons equipped. Mega Kill Clip is CRAZY though. it's 40% buff (PvE), 5s 2s for every kill up to 5 (17s). The kills don't need to be rapid as long as you reload within 5s of final kill!