If you're looking for manga similar to Miami Guns, you might like these titles.
There are always incidents and crimes in New York. Detective Troy of the NYPD is trying to find his missing friend Nathan, but it's not going that well. A beautiful detective, Angel, just became his new partner, but they don't get along at first.
Tetsunosuke Yamabuki enrolls in the police to follow in his fathers footsteps. Some events lead him to discover that his father might have had links with a secret branch called the death brigade, and he is led to enter it himself. Wacky adventures and hilarity ensues.
Haruki Anjou, a policeman in the quiet town Nagashima, would rather spend his days slacking off and reading dirty magazines than enforcing the law. So when he receives news that a young, busty rookie from Tokyo is transferring under him, the perpetually single pervert thinks it’s a dream come true! There’s just one catch: she’s Kiruko Otonashi, an ex-mercenary with a gung-ho mindset and a penchant for destroying the neighborhood in the line of duty! Now Nagashima’s streets are anything but calm, and as Kiruko’s senior, it’s up to Haruki to rein her in, lest he lose his job!
A manga which follows the lives and experiences of a couple of female police officers.