Because Nuge realizes that people can change their minds in 15 years. Trump’s sons are avid shooters and hunters, and Trump credits them with educating him on the nuances of gun issues. But he was never anti-gun in general.
He carries himself. In NYC no less.
Other than that whole support the “assault weapons” ban thing. Other than that, why golly, he’s just peachy keen swell on the second amendment.