In previous version of six guns,the swarm gun can only be obtained in the lottery. And this weapon cannot be use in multiplayer in previous versions of six guns. It takes about 100 tries (2000 stars) to win it in the lottery during that time, But now, gameloft made the game better.
This weapon was released in six guns version 1.0.4. After six guns version 2.0.0, the swarm gun was priced.