In the winter of 2008, shortly after the election of Barack Obama, my fiancee and I stopped into a local gun shop in Austin to buy ammunition for target practice, a hobby we enjoyed once or twice a month. Though we hadn't asked, the clerk behind the counter told us that all the AR- and AK-style rifles were back-ordered. We could get on the waitlist, he offered, but the delay might be a couple of months — "if it's still even legal to buy one then." Eight years later, gun rights in America appear not only to have survived the...