It still seeks to force states to allow carrying a weapon

It doesn't because someone without a valid state permit still wouldn't be allowed to carry a weapon.

What it does is raise a full faith and credit issue, which may or may not survive judicial review. But to strike it down a court would only have to say that state X can't be forced to recognize a permit from state Y.

As for constitutional carry, that's a a function of state law and state constitutions. Allowing citizens to carry without any permit is a policy choice that may be informed by the second amendment, but it's not dependent on the existence of the second amendment (because rights don't come from the constitution; they come from god and are merely protected by the constitution).

It still seeks to force states to allow carrying a weapon

It doesn't because someone without a valid state permit still wouldn't be allowed to carry a weapon.

What it does is raise a full faith and credit issue, which may or may not survive judicial review. But to strike it down a court would only have to say that state X can't be forced to recognize a permit from state Y.