FDL-2v Barrel Insert
This is a simple barrel insert for the FDL-2v barrel. I found this to be an appealing way to add an orange tip to the blaster so that it complies with US law.
It will fit pretty snug with everything screwed together, however I personally glued it to the top half of the barrel. I would not recommend gluing it to the bottom, as this may cause some headaches if you ever have t disassemble it to clear a jam.