This Adapter endplate permits a tracer to be affixed to any type of shotgun by replacing the endplates. This is the adaptor and endplate only not the tracer.  Endplate for the PCU Tracer Unit for Shotguns. Choose the respective Unit for your Shotgun and simply add to your tracer unit as an adapter.  Package include:1x PCU Adapter of selected option1x PCU Shotgun Tracer unit Shell ALU1x PCU Shotgun Front Cap ALU Does not include:PCU Shotgun Tracer unit Engine Gen.5