Not that, we are talking about plot wise as if in story, it won't have regular/classical/rl guns like 9mm and things along those lines. Like how they invented phones, computers. Not happening with guns and they are not becoming a thing like those, that's what it meant
Maybe, just maybe Shin and Sasuke are brothers that come from a race of fighting aliens that conquer and sell planets for an overlord who might have destroyed their home planet. That's why Kaguya was trying to raise an army to fight of this villain.
Kishi said in an old interview that there might be automobiles in NV but never a gun, maybe it's some variant of gun, I don't have a link though but I ain't making that up.
SJ: One thing I love about Naruto is how it's hard to tell when things take place. People wear slippers but then there are zippers in their clothes and they have telephone poles. What are the things we'll never see in Naruto - computers, guns, planes?
Kishimoto: I haven't really made up those specific rules, so there may be airplanes and some other vehicles, but absolutely no guns. Bullets fly at supersonic speeds, so there's no way that your shuriken could compete. As for computers, maybe, but they'd be low processing computers.
SJ: Eight-big?
Kishimoto: Yeah, maybe eight-bit, definitely not sixteen-bit.
He's says a lot...but people change...this is why his interviews shouldn't be take as a holy grail :hmm: