Prosecutors have hit Duane Brown with a criminal charge stemming from his arrest at LAX last weekend ... and now, the NFL star could be facing up to 1 year behind bars if he's convicted.
We broke the story, the five-time Pro Bowler -- who most recently played for the Seattle Seahawks -- was busted at the airport in L.A. on July 9 after authorities said he tried to go through TSA with a gun in his luggage.
Now, TMZ Sports has learned Brown has been charged by Los Angeles City Attorney Mike Feuer, a longtime national leader on gun violence prevention.
According to court documents, Brown was hit with one count of carrying a concealed weapon, a misdemeanor that carries a penalty of up to 1 year in jail.
"To err is human, and this clearly was an accident," Brown's attorney, Kennard McGuire, said. "As a law-abiding citizen, Duane will continue to exercise proper judgment and continue education on gun safety measures."
36-year-old Brown -- a former All-Pro -- is currently an NFL free agent.