For me, I've never had any 3 way swivels that rotated as well/easy as what I have shown below. Less line twist, and I have a snaps on the ends where I want/need it. But I'm sure they would work.
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can somebody show me what a weapon is
From what I know a weapon is just a harness with a single hook behind it. Usually tipped with half a crawler and meant to simulate a mayfly. Could be wrong. You can just cut the back hook off any harness to make your own.