Here is PDI the latest upgrade information. Now we finished the development for TM L96 Cylinder Kit. Maybe within 2 or 3 days,we'll start to sell.

These parts are all new developments:

Cylinder
1.Stainless steel all CNC machined.
2.Welded the boss & body.

SP guide
1.Stainless steel all CNC machined.
2.Come with a Delrin ring.
3.13mm Spring

Piston
1.Stainless steel(End) Duralmin(Head & body),Delrin(Ring) all CNC
machined.
2.13mm Spring

Cylinder head
1.Stainless steel all CNC machined.
2.Tapered process to be smooth airflow

Thanks

Tomo
http://www.x-fire.org/e.index.htm