As a general rule the technology of the Garlean Empire far surpasses anything that can be found in Eorzea. At the same time they're also efficient enough to make use of conventional weaponry - many of their soldiers can be seen wielding bows, staves and various other common weapons in combat. Sniper rifles and regular pistols don't strike me as being much of a stretch, either. Provided they're largely kept in Garlean hands and don't magically become the norm for the people of Eorzea.
Regardless, a nation having advanced technology does not equal having access to everything and anything under the sun. I'd avoid making use of things that aren't in line with what is seen in the game itself, otherwise it risks becoming an arms race as to who has the character with the most gimmicky weapon(s). I've already seen a few characters walking around with missing limbs replaced with magitek that are mysteriously much more agile and powerful than regular limbs - which makes it less of a drawback and more of a boon.
Regardless, a nation having advanced technology does not equal having access to everything and anything under the sun. I'd avoid making use of things that aren't in line with what is seen in the game itself, otherwise it risks becoming an arms race as to who has the character with the most gimmicky weapon(s). I've already seen a few characters walking around with missing limbs replaced with magitek that are mysteriously much more agile and powerful than regular limbs - which makes it less of a drawback and more of a boon.
