Perhaps in this fanfiction, Naruto discovers that he has some unique weapon - like abilities that are different from his normal jutsu. It could lead to a whole new adventure where he has to learn to control this 'weapon' aspect of himself while still being true to his friends and the village.
Maybe in this fanfiction, Naruto is separated from his normal friends and mentors. Instead, he is surrounded by cold - hearted trainers who see him as nothing but a tool. They might even suppress his emotions so that he can be a more effective weapon. He could be sent on dangerous solo missions where the sole objective is to eliminate the target using his new - found combat skills.
In this fanfiction, perhaps Hinata discovers some unique power within Naruto that can be used as a weapon. Maybe Naruto has a special form or ability that only Hinata can unlock and utilize in battles against their enemies.
Perhaps it's a unique staff. A staff could have different uses, like being a conduit for chakra. It could also have hidden compartments or be made from a rare material that gives Naruto an edge in battles. For example, it might be made from a metal that can absorb chakra attacks and then redirect them.
In this fanfiction, it could be that a powerful enemy from another dimension arrives. This enemy has the ability to turn living beings into weapons. They see Naruto as a prime target because of his strong chakra. Once turned into a weapon, Naruto might be used to break through the defenses of Konoha. His friends then have to find a way to reverse the transformation, which could involve a long and dangerous journey to find a special antidote or a powerful jutsu.
Well, it could be a sword with the power to cut through any jutsu. Maybe it has some special markings that only Naruto can understand. It might also be a staff that can control the elements in a unique way, giving Naruto an edge in battles.
Naruto might be a staff - type weapon. He could use it for both close - range combat and to channel his chakra or soul power. The staff could have different forms, like it could extend or transform into other shapes depending on the situation, similar to how he can transform his Rasengan.
One possible perfect weapon in Naruto fanfiction could be a sword that can cut through any chakra - based defense. It would give the wielder a huge advantage in battles against powerful ninjas.
It could be a super - charged kunai. Maybe it has some kind of special chakra - enhancing ability that makes Naruto's attacks much more powerful than normal.
It could be a sword that can cut through any substance, like the Susanoo easily. Just imagine Naruto swinging it and slicing through powerful jutsu defenses as if they were paper.
Well, in this fanfic, perhaps Minato turns Naruto into a weapon because of a dark prophecy. Minato thinks that by making Naruto a weapon, he can prevent the prophecy from coming true. So he trains Naruto in a very different way, focusing more on raw power and combat efficiency. Naruto starts to show less of his usual goofy self and more of a cold - blooded fighter. His friends are worried about him, but Naruto believes he's doing the right thing for the village. Eventually, Naruto might have to face a choice between being a weapon or reclaiming his old self.