In case your desired weapon is not listed in the collection of supported items it is probably currently unsupported. However you can still add it to the mutator manually!

In few simple steps:

1.) Install the weapon correctly! Make sure, you know the pickupname of the weapon. See explanation below.

2.) Add the WeaponsWorkShop mutator to your game in the mutators screen.

3.) Click on Configure Mutator. Enable the checkbox view advanced options next to the cancel/ok buttons.

4.) Below the long list of supported weapons there is a textfield for unsupported weapons. You can enter the pickupname there. If you don't know what this name is, look below these steps.

5.) If you want to add more than one unsupported weapons, then you can enter multiple pickupnames by separating them with ","



The pickupname:

The name consists of a packagename, a dot and the pickupclass. It usually looks like
You can also refer to this list: Gun Weapon List[forums.tripwireinteractive.com], but make sure you leave out the first part, since it lists the weapons like this:


Please note:
The WeaponsWorkShopWIP mutator is updated more frequently and might support the weapon even when the normal WeaponsWorkShop does not. If you play solo or have no problems with frequently updating your server, you may consider that version.
If the WIP also does not support your desired weapon, feel free to inform me. I usually only add weapons that are available for subscription on Steam, but might have missed some.