The Outlaws

Roundup is also action-packed with a lot of humour.
Roundup is the sequel. If you are enjoying Ma Dong Seok films, then see the sequel too.

The outlaws is the first one of this saga.
Is about a cop that works with 2 chinese gangs and try to get them controlled, at some point a group appear and the cop have to work with the people of that area to get them in jail.