Reading the opinion (150 pgs with dissents) now. Scalia writes. It's 5-4, the majority signing the one opinion, no concurrences or fragmentation. Individual right not linked to militia service. No need to settle standard of review, since a complete ban on a wide class of arms fails all of them. DC ordered to allow Heller to register his handgun and carry it in his home.
Side note that this does not cast doubt upon felon in possession, etc., or bans within narrow sensitive areas such as courts and schools.