The data OP is using is questionable. CBS shows California as fourth and Texas as first. Florida is number 2.

CBS is using date from the ATF and RAND. ATF data doesn't include pistols or assault style rifles.

The RAND Corporation published a 2020 study on adults who say they live with at least one gun. And every year, the Bureau of Alcohol, Tobacco and Firearms publishes a list of federally registered guns by state. It covers only a subsection of weapons — short-barreled shotguns, short-barreled rifles, and machine guns are included, along with silencers and destructive devices like grenades, but ordinary pistols or AR-15s are not.