Changes
/* Weapon lights */
There are no special restrictions to using a mounted USG, it can simply be selected for use and fired, as if it was a standalone weapon. Critical failures and weapon malfunctions when using the shotgun only affect the shotgun's Condition, without affecting the mounted firearm.
Attaching a USG to a compatible host firearm may increase '''increases the host firearm's weight by one tier'''. Each USG model has its own compatibility list, see the list below for details.
* '''[[List of underbarrel shotguns]]'''
= Optics =
When switched on, weapon lights emit light that '''cancels the [[Effects|environmental blindness effect]]''' caused by dark rooms and other places with no light. As it is a source of bright light, the weapon light will allow every creature in the room to see in a dark room, not just the owner of the weapon light. It is also a source of bright light; regardless of whether the room is dark or not, '''a weapon light turned on will break stealth'''. It is advisable to remember to turn it off if you're about to face hostile creatures.
=== Weapons compatible with weapon lights ===
