Denzel Washington teams up with that King of Chemistry, Mark Wahlberg, in “2 Guns,” a jokey-bloody action comedy that could use more jokes and less blood.

Wahlberg’s Icelandic accomplice, “Contraband” director Baltasar Kormakur, manages little flash in this utterly generic double-and-triple-crossing tale of agents for competing agencies mixed up with drug lords, DEA stings, the CIA and “naval intelligence.”

It’s based on graphic novels (aka comic books), so don’t overthink it.

Washington is Bobby, a cross-border smuggler/drug dealer trying to do business with Papi Greco (Edward James Olmos), a Mexican drug kingpin.

Stig (Wahlberg) is Bobby’s mouthy, trigger-happy sidekick, the one who cracks that Papi looks “like a Mexican Albert Einstein,” who stuffs his face with Mexican fried chicken as he yells at the cruelty of Mexican henchmen who shoot at the heads of chickens buried up to their necks for target practice.

For some reason, Bobby and Stig have been in business together for months. For some other reason, neither has figured out that the other is a federal agent of some sort.

And for some silly third reason, they ignore their own advice — “Never rob a bank across from a diner that has the best doughnuts in three counties.”

It’s a movie of unsurprising revelations, betrayals, agencies that double-cross their own agents and Paula Patton naked. She plays Denzel’s DEA control agent.

Bill Paxton’s a sadist who doesn’t have to explain which government agency he works for as he drawls through assorted brutal interrogations, trying to track down the bank robbery cash.

James Marsden plays the Navy guy in inappropriate uniforms every time he debriefs his agent, Stig.

Marsden was cast because he’s the same height as Wahlberg. Olmos took his part just for the scene where he gets to sermonize about CIA efforts to keep Mexico “corrupt and poor.”

Bobby and Stig fight, draw blood and crash trucks into one another. Until they learn trust.

Until the “p-word,” partner, comes up.

“Like ebony and ivory!”

The amusing stuff works so much better than the mayhem, which also has the occasional amusing moment. Stig gets the drop on a henchman by sliding between his legs.

A lot of plot is worked through, a lot of stuff blows up and a lot of cars are stolen, raced, crashed and shot up.

And people die. Lots of them.

And 100 minutes later, we’re all done, and left craving a much better movie than “2 Guns” managed to be. That, and doughnuts.