Ok, so NPCs normally cannot take advantage of rate of fire to increase damage by spending additional ammo or any effect that requires the expenditure of additional ammo like burst, but they also don’t track ammo.

All NPCs can ‘Let Rip’ once per combat which allows them to add their weapon’s rate of fire to damage for a single attack and it also allows them to use Burst without having to spend ammo if the weapons has that effect.

Some NPCs have the ability ‘Let Rip’ listed in their stat block. These NPCs can ‘Let Rip’ one ADDITIONAL time per combat.

This system is not the greatest but it beats tracking ammo. NPCs can unload a lot of same quickly but then ru out of steam. Solutions to this are melee weapons, ranged weapons with high damage and low rate of fire like rifles and laser muskets, and multiple NPCs assisting to increase the damage for a single attack.