It’s not easy to pull off a satisfying shoot-’em-up in this day and age. The subgenre became somewhat tired long ago, which means that current efforts either try too hard to reinvent old tropes or feel dispiritingly familiar. (For every John Wick, it seems we get any number of John Wick wannabes.) And then there’s the whole morality thing: Get too real and you’ll turn off, or maybe even piss off, a viewing public already sensitive to the real-life toll of guns and glorified carnage. In that context, Joe Carnahan’s Copshop inhabits an enviable Goldilocks Zone for movies about dudes getting their heads blown off. It’s clever but not cute, savage but not depressing, and cartoonish but not asinine.