The mod Gun Equipment (0.0.17) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event GunEquipment::on_tick (ID 0)
GunEquipment/AutoGun/control.lua:152: bad argument #1 of 2 to 'pairs' (table expected, got nil)
stack traceback:
[C]: in function 'pairs'
GunEquipment/AutoGun/control.lua:152: in function 'ActionDamage'
GunEquipment/AutoGun/control.lua:142: in function 'DirectDamageType'
GunEquipment/AutoGun/control.lua:174: in function 'OnInit'
GunEquipment/control.lua:15: in function <GunEquipment/control.lua:13>

Can I ask for list of mods, you use.
In case the original game was not changed, there is no ammo not containing:
action.type.action_delivery[type=instant].target_effects[type="damage"]

same

Error while running event GunEquipment::on_tick (ID 0)
LuaPrototypes doesn't contain key visual-tracer-projectile-normal.
stack traceback:
[C]: in function 'index'
__GunEquipment/AutoGun/control.lua:164: in function 'ActionDamage'
GunEquipment/AutoGun/control.lua:146: in function 'DirectDamageType'
GunEquipment/AutoGun/control.lua:178: in function 'OnInit'
GunEquipment/control.lua:15: in function <GunEquipment/control.lua:13>

seems conflict with that mod https://mods.factorio.com/mod/visual_tracers

without Bullet Tracers works fine

I will try to fix it for this mod, but it can take some time

thank you! ;)