Need help recognizing a weapon from a mod

[ForcefulMocha]

I was rewatching JuiceHead's video "5 mods to Improve the Brotherhood of Steel" (https://www.youtube.com/watch?v=mLhJ49ioiV8)and at the 3:47 mark he goes to show a location for the Revolver Rifle mod, but in doing so he shows a unique weapon called Ad Victorium.

That unique weapon is not in any of the mods he talks about.

 

Does anyone know what the mod is or where it is from?

 

Here's the weapon (In case it wasn't obvious, it's the weapon with the light gray barrel that's his cursor is over):

 

[yuser]

I think it is from the Wattz Laser Gun mod.