Another new series from JUMP SQ! By the end of the chapter, you'll understand where the title PAT-KEN comes from. This manga is about a boy named Hayabusa, who dreams of becoming a hero in the name of justice. Which is why he took up a part-time job acting as a costumed hero for a children's stage show. But, when the real villains, the Darkside Arms (DA), attack, the real heroes of the city, the Armored Guardians (AG) are called in. Will Hayabusa be allowed to join the Armored Guardiands and attain his dream of becoming a real hero? Many themes in the manga are borrowed from television sentai series, so fans of Power Rangers might enjoy this!
(From Mangahelpers.)

This is all about a 16-year old guy named Gan(family name: Goda) who, along with his various fighting -video-game-styled pals, opposes the very naughty Hanged Cross gang on an alarmingly regular basis.
As the story begins, Gan is a juvenile delinquent who has been booted out of one too many schools for chronic bad behavior. Gan's father, a hotdog supercop with the moniker of "Dan Goda," is fed up with this situation to the point where he decides to send Gan to his old educational institution: a fighting school called Roujuu Private High School. There, Gan learns to harness his raw abilities into "Gunfighting," the family martial arts style resembling firearms. Think .44 Magnum punches, Shotgun Fists, Sniper Stances, and you've got the essence of Gun-Fu down.
At his new school Gan also falls madly in love hot chick, Yuki and runs afoul of 17-year old transfer student and sure-to-be-rival Garrick Rider, prodigal master of the Hanged Cross technique. Fights over Yuki's affections take place in the school stadium, but it turns that she has little need for defenders of her honor. Yuki is, like an overwhelming majority of students at Roujuu, a fantastic fighter. And from here on out, everbody is not only "kung-fu fighting," but also busy filling pages with over-the-top battle scenes.
(Source: M-U)

A young boy is saved by a mysterious gunfighter who uses magical bullets. She is the greatest magician in the world but disappears shortly after saving him. Having fallen in love with her, he trains to become a gun fighter and ten years later, his search comes to an end but his adventure has just begun. Kurohime is a buxom witch with the power to control magical guns. She once made the mistake of challenging the gods and was cursed for her foolishness! Transformed into a little girl named Himeko, she can only regain her former body and powers when she falls in love. But finding love in a world fraught with evil is no easy task.