Allows you to easily change threads on a Tundra or Multimount LID to use one suppressor on either U.S. standard threaded pistols (1/2-28) or with European (M13.5x1mm LH) threaded pistols. Installs in the field without the use of tools. 1/2-36 for use with 9mm carbines. LID body, Spring, and Piston Block not included. This is the threaded piston only.