Butt Stock Pin

-  This Butt Stock Guide works with GEN1, 2, 3, 4, 5, 6 T68 Flex-air Adapter  , and
   T68 Pistol line Markers.  ( more info )   Comes with 2 mounting screws.
-  For use with 12g disposable, 35g, 45g and 60g refillable cylinders.

-   Note: Not compatible for use with 88g disposable cylinder.

We have 2 versions for your stock adapter, check your T68 for which version you have by matching it with this photo.