These shocks have a plastic internal piston. It also doesn't have a wiper on it. This new design allows the piston to cock in the bore so the Nitrogen gas in shock which is at 200psi and much more under compression will bypass the piston and get Oil into Nitrogen and Vice versa. Also the piston when cocked in bore can cause shock to stick or worse break the piston itself. All shocks eventually need servicing for a variety of reasons including this but these shocks will require much sooner intervals. This was just a cost saving measure. When servicing these shocks I am recommending replacing this piston with the older style aluminum piston which is a much better design. The QS3 rc such as on LE models have a good aluminum piston so they are not a issue. Here is some pics of one that was actually broke and the aluminum piston I replaced it with.
