Released by IGN, the poster expands on the first-look image unveiled last week, focusing on Arnold Schwarzenegger in uniform as Sheriff Ray Owens.
Owens is a disgraced Los Angeles policeman who has been moved to a small border town, and is called back into action after a drug cartel arrives to do business there.
"He hasn't had to flex his muscles in a while," Schwarzenegger has said of his character, "so when the gangsters come to town, it's a big test."
Genesis Rodriguez, Forest Whitaker and Johnny Knoxville also star in the Jee-woon Kim-directed action thriller, which has been billed as Schwarzenegger's "comeback movie".
Schwarzenegger stars alongside Sylvester Stallone and Bruce Willis in The Expendables 2, which opens this week in the US and UK.
Watch a trailer for The Expendables 2 below: