They pulled AR-15s off their shelves after the Newtown shootings, just like Walmart stopped selling all handguns after some shootings back in the 90's.
Some folks like to stand on convenient principle and pretend they are some kind of 2nd amendment warriors or something.
No. Some people will not break on principles. Period. It is those that bend on them, that causes them to weaken and break.
But the main thing is, principles are not something you hap hazard'ly toy with, they are engrained and bullet proof, you either have them or you don't.