It leads to a gang whose leader has a valuable weapon. Gunner patrols would sometimes have one member carrying the note.
I got the intel. The gang at <Alias=Dungeon> looks tough, but their leader has the gun - a <Alias=Weapon>, just like the contact said. The right squad of men could take it.
Inspecting the note shows it as a torn note. However, when reading it, it's in full A4 format.[verified]