Description
These barrel adapters are to change the threads of a barrel to a different one.
Male end is: M98 and the female end is Ion/Shocker
Male end is: A5 and the female end is Ion/Shocker
Male end is: Autococker and the female end is Ion/Shocker
This means that they screw in to a Ion/Shocker barrel and gives you either the 98, A5 or Aoutococker thread.
It will also add about 2 inches to the total length of your barrel.