From The Federalist:

I’ve seen my friends and colleagues on the Left side of the gun control debate dumbfounded at why Second Amendment advocates don’t seem to budge on their views after mass shootings. So I thought I would try my hand at explaining this phenomenon in the hopes that maybe more will be inclined to have a better conversation about guns and the Second Amendment in America. There are several reasons 2A advocates aren’t running to your side of the argument, and it might not be the ones you think.