The National Shooting Sports Federations chart tells the tale: it’s all about the handgun. Two engines are driving the trend: the increasing liberalization of concealed carry laws (Wisconsin sales set to surge) and the new crop of small handguns. Look for this trend to cool . . . never. The only potential brake on the action: when everyone who wants a new handgun has one. Or enough of ’em. In that sense, I’d be interested to see what percentage of these buyers are total newbies. The NSSF doesn’t track that data, but firearm sales were up 11 percent in May. What do we call this new booming market, as the Obama sales surge was a black rifle deal? The Big Mac effect, after the Supreme Court’s McDonald decision?