Oh, I also just realized I said "dupe" in first message. I meant "trade". Must have read someone else's post about duping before that and had it in my head. Sorry for the confusion. Prefer not to dupe.
Yeah, I thought about that, but didn't want to lose all my progress in everything else (access to bosses, maps, etc.). If I don't manage to get one via trade, may just wait a little while until I'm satisfied with current weapons then reset.