movie about detective finding assassin with shell casing from special gun

Tired of the crime overrunning the streets of Boston, Irish Catholic twin brothers Conner and Murphy are inspired by their faith to cleanse their hometown of evil with their own brand of zealous vigilante justice. As they hunt down and kill one notorious gangster after another, they become controversial folk heroes in the community. But Paul Smecker, an eccentric FBI agent, is fast closing in on their blood-soaked trail.

Skillfully framed by an unknown enemy for the murder of a priest, wanted vigilante MacManus brothers Murphy and Connor must come out of hiding on a sheep farm in Ireland to fight for justice in Boston.

A cop who loses his partner in a shoot-out with gun smugglers goes on a mission to catch them. In order to get closer to the leaders of the ring he joins forces with an undercover cop who's working as a gangster hitman. They use all means of excessive force to find them.

Ex-con Johnny is forced into pulling a heist he wants nothing to do with. Mob boss ‘Shrewd’ Eddie has one million is dirty cash stashed at his home, just waiting to be stolen. But what Johnny doesn’t know is that seven other very dangerous criminals also have plans to steal the money...

An assassin working for the CIA decides to take one final job before quitting only to find out that he is the target of his CIA boss.

When 150 guns are stolen from Iwakuni base and two police officers are shot dead, a detective criminal tries to find out the truth.

A detective drama that realistically shows the work of an experienced detective who, under cover, pursues the organizer of the arms trade route from Kobe.

Private Detective Ippei Shizuno faces off against a serial killer and a wealthy woman's society who runs an illegal gun trade.

A series of murders has been committed by someone with a new model gun, a Mord-Gessel X 38. Indeed, Daisuke himself is almost killed while investigating the case. This occurred while he was with Ritsuko, daughter of a company president. Detective Kimura thinks that the president himself, returned to Japan after an absence of fifteen years, might be the killer, or at least the man who supplied the gun. Ritsuko's father limps and though she explains this as the result of a traffic accident, Kimura remembers a narcotics smuggler named Suginami who shot himself in the ankle and then escaped from the hospital. He believes that the company president and the drug peddler are the same.

A contract killer accepts a final assignment: to act as a bodyguard for a Chinese girl wanted by a criminal organization...