Art 6 para 2 is the only “incorperation” any of the Amendments needed. They eventually put in a separate Amendment to try and get it to stick again, but then the SCOTUS screwed that up by coming up with a Selective Incorporation doctrine that is no part of their mandate.
That, too. The 2nd, though, needs no cross-reference to any other part of the Constitution. Unlike the other amendments in the BOR it is plainly absolute on its face.