Katya uses a crossbow.
The bolts from her crossbow to have significant drop-off over distance, and are very much not hitscan weapons like the guns of other operatives.
Note that linguistically an "arrow" is the projectile shot (not fired) from a bow, whereas crossbows shoot "bolts", however SCZ usually refers to Katya's bolts as just "shots".
(Guns fire their bullets because they burn gunpowder to do it. Bows and crossbows do not use gunpowder, and are thus not fired - they are shot.)
(Also; yes, modern [smokeless] gunpowder is not an explosive as it burns at below subsonic speed. Gunpowder is thus a deflagrant, not an explosive.)
Crossbows can't crit, even if shooting at a weakspot.
Even if they could crit, all crossbows have a 0% Crit Dmg value.
This means that Katya's crits would always deal the same damage as her non-crits anyway.
In SCZ, the Crit DMG Amplifier stat only add to the Crit DMG stat of the operative.
For example if an operative has 60% Crit Dmg and +50% Crit DMG Amplfiier, then their crits wil deal 190% damage (100% base, plus 60%*1.5 for the extra from the crit)
Since Blue Bolt has 0% crit dmg, Crit DMG Amplifier mods wouldn't do anything for her, as anything x0 = 0
Since Katya can't ever deal actually deal extra damage via crits, the support buffs from other operatives that give crit buffs will instead give ballistic damage to Crossbow users.
For buffs from other operatives, how much Crossbow users get will always be explicitely stated.
For unspecified buffs, Katya gains 1% ballistic damage per 1% crit rate, and 0.6% ballistic damage per 1% crit damage amplifier.
Infinite Ammo and Ammo Types
Katya's crossbow has infinite ammo and never needs to reload.
If you press the reload key, Katya will instead swap between "Normal firing mode" and "Special firing mode".
Normal firing mode fires single-target bolts. By-default these fire at a rate of 150 shots/minute (2.5 shots/second).
Special firing mode fires bolts that have a lower RoF but deal AoE damage (to up to 5 targets). By-default these fire at a rate of 85 shots/minute (1.41 shots/second).
Katya also passively gains a 35% chance to gain extra 35% Frost damage for each of her shots.
Plus an extra 7% damage per 100 Alignment Index.
Whilst shooting AoE bolts, the chance is doubled, but the damage bonus is halved.
This extra damage deals double damage against Frozen enemies.
This extra damage counts as skill damage.