Who cares about the semantics? Hopefully we all know the difference between a heat seeking missile and an arrow RIGHT?

Pretty much any anime that involves samurais or ninjas with guns or cannons, the people with guns and cannons tend to rank among the deadliest opponents.
I mean, a rich guy with a gatling gun managed to take out 4 of the best out of Aoshi's clan in Kenshin, am I right?

If heat seeking missiles and firearms existed in the naruto world, then ninjas would end up borderline obsolete.