Verb
(transitive) To strive for the downfall or diminution of another.
He has been gunning for her since the day he arrived, he wants her job.
(transitive) To pursue as a goal; to work hard to achieve.
Source: en.wiktionary.orgI was a soldier, and I created a machine gun for a soldier. It was called an Avtomat Kalashnikova, the automatic weapon of Kalashnikov - AK - and it carried the date of its first manufacture, 1947. Mikhail Kalashnikov
I've carried a gun for 10 years. I've carried them in the locker room, and nobody really knows about it. I know how to handle myself, and I stow it away where nobody really knows about it. Luke Scott
As long as there are guns, the individual that wants a gun for a crime is going to have one and going to get it. Ronald Reagan
Film's hard when you don't have any relationship with the director at all and you just show up. Then you really are just a gun for hire. Philip Seymour Hoffman
Anita said she mistook the cocking of the gun for the sound of his typewriter keys and hung up as he fired. Source: Internet
Armed with a gun for an arm, the Mega Man series would become insanely popular among platformer and action-RPG junkies and would spawn 50 additional games, a handful of TV, anime, comic, and film adaptations. Source: Internet