An extra LID Piston Core allows you to easily change threads on a TUNDRA or MULTIMOUNT LID to use one suppressor on U.S. standard threaded pistols (1/2-28) European threaded pistols (M13.5x1mm LH) or even 9mm AR-15 carbines (1/2-36 - requires piston blocking tube) . Installs in the field without the use of tools.

LID body Spring and Piston Block not included shown for illustrations only. This is the threaded piston only.