Have to be careful in what you write, and i would suggest you read what i wrote above, since i covered that already.
Looks to me your getting your timelines mixed up.
Before and during Qumran, Insians were nothing but labor, at the service of the Narians.
And i would time that for more than a decade.
Nawa wasnt even known nor mentioned to insians before the defeat of the Narians, so Nawa engineering happened AFTER the Age of Qumran.
Insians had no weapons then, but wood and iron, or whatever is natural ressource the planet has to offer.
This is exactly why the Narians and the Mages had the supremacy over Insians.
Its a bit like our Earth History, we always had petrol, but i dont think Louis XIV was rolling the Court with a BMW. He had horses at the time, i think.
In fact, Qumran Age and rise is very similar to Vercingetorix History.
While the whole continent (the planet in our case) fell under the Magnificent, well advanced, Roman empire (our Narians), one man stood and unified tribes and fought, held and repelled the invader.
The only difference is that Vercingetorix eventually fell, as he was too late to unify tribes, while Qumran used Magic to repel the Narians; and he wasnt even aware of the power of his magic nor the power of the Book, since he got weakened and bedridden then.
THEN, and only then, Insians were free, developed civilisations, eventually labs and researched Nawa.
That very likely didnt unfold overnight either.
As you can see, the Mirath serie is low damage, but extreme range.
I would date that post-Qumran Age, after civilisation already developed, and came to Nawa engineering. So like centuries, since its more important to build cities, law and order, than nuclear weapons, on an Historical point of view, but also energize daily life, so build ans engineer a reactor, enhance cities, then look at smaller assets like vehicules and weapons.
That give a clue that it was a primitive Hunting carbine, for getting food, rather than planning war.
Ill add to this that Sunjoqs are mentioned to have been mounts for jeefs, and also the Duhols escorting merchants throught the mountains.
None of this would a been happening if early access to Nawa manipulation/engineering would a happened earlier, since that would a meant, vehicules.
Hope this clarify a bit