The Gatling is one of the best-known early rapid-fire spring loaded, hand cranked weapons and a forerunner of the modern machine gun and rotary cannon.
"For one scene, we got the world's most powerful machine gun -- Gatling -- and choreographed an action sequence featuring Tiger. It is a sight to see him tear down a city with this insanely powerful piece of a military weapon," director Siddharth Anand said in a statement.
Calling Tiger an "incredible action hero", Anand said he wanted to show people something that he had never done before.
In 'War', Tiger will be pitted against his real-life idol Hrithik Roshan. The film also features actress Vaani Kapoor.
"War" is set to be a visual spectacle for quintessential action cinema lovers who would witness Hrithik and Tiger pull off jaw-dropping sequences as they try to beat each other.
Produced by Yash Raj Films, the high-octane film is to release in Hindi, Tamil, and Telugu on October 2.