W”Killing Them Softly” is, in its own chatty and slight way, the “Unforgiven” of hit-man thrillers. It’s a gritty, riveting nuts-and-bolts-of-murder tale that vividly illustrates what it is that these much-glamorized thugs do, and the gruesome, agonizing fate of their victims.

The guys the contract killer (Brad Pitt) comes after fit this memorable “Unforgiven” quote:

“I guess they had it coming.”

But this reply is just as apt:

“We all got it coming, kid.”

The mob lawyer (Richard Jenkins) arranging all this mayhem tries to minimize the death toll, calling one target “a nice guy.” The cynical Jackie (Pitt) informs him that “They’re all nice guys.”

It all starts with this mob-protected underground poker game that Markie (Ray Liotta) ran. Markie’s got a history of having his games robbed. And this one mug, Johnny the Squirrel (Vincent Curatola), figures a way to pull another heist and let Markie take the fall. Of course, getting ex-con Frankie (Scoot McNairy) and Frankie’s Aussie-junky pal Russell (Ben Mendelsohn) to do the deed wasn’t the smartest move.

That’s why Jackie’s been called. That, and because everybody’s favorite local hit man (Sam Shepard) is sick.

Jackie figures there’s a lot of work here, something he lays out to the lawyer in a couple of long, heart-to-heart talks. So Jackie brings in a subcontractor, New York Mickey (James Gandolfini). But Mickey’s a mess, an aggressive drunk who holes up in a hotel emptying bottles and insulting hookers. Events are going to outrun them all if Jackie doesn’t get a handle on things, tidy up.

Where Dominik and Pitt’s previous movie together (“The Assassination of Jesse James by the Coward Robert Ford”) was daguerreotype slow and stately, “Softly” is slow and freighted with obscure meaning.

That leaves “Killing Them Softly” with just a hint of the under-developed, a big metaphor not quite digested. But even that shortcoming doesn’t obscure the fine, flinty performances and unflinching realism of the one hit-man thriller among many to not seem redundant, worshipful and glamorous.

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