This was in New Jersey -- it's entirely plausible.
I don't even live in New Jersey. I know of not one but TWO small-ish towns in my state where gun shops have opened within the past six months, and in BOTH towns the zoning boards are scrambling to try to craft regulations that will make it so no other gun shops can open in their towns.
I find it ironic that FBI statistics show so many more murders being committed with hammers than with rifles. The uproar in both towns is that these shops might sell the same kind of evil assault weapon that was used at Sandy Hook. Meanwhile, each of these gun shops is within maybe 200 feet of a hardware store, where they sell (OH THE HORROR!) HAMMERS! ... yet there's no rush to ensure that nobody can open another hammer store in either town.
Peepelz iz schtubit ...