Naruto: Who Says Katyusha Isn’t a Ninja Technique?

I'm Hatake Fire Fly, and I transmigrated into Kakashi's younger brother's body, with a [Fear of Insufficient Firepower System] bound to me. System: Ninjutsu? Making a ball of chakra? That stuff's too weak. It's embarrassing! For the Clone Technique graduation exam, the System decided it was too lame and rewarded me with [Ninjutsu: Desert Eagle] on the spot! I blew up the target with one shot and told the examiner it was a “bullet clone.” Iruka-sensei crashed on the spot, and Mizuki started looking at me strangely! Facing the rogue ninja Mizuki, I hoisted an RPG. “There's no problem an RPG can't solve with one shot!” After one blast, the rogue ninja was gone, and both Iruka and Naruto were dumbfounded. From then on, the ninja world had a new kind of pacifist, one who carried a rocket launcher. Kakashi (with a headache): “You foolish little brother, you call that ninjutsu?!” Fire Fly (hoisting his RPG): “Bro, times have changed! My ninja way is: caliber is justice, and range is truth!”