Direct flow Expansion chambers for the T4e umerex markers

Direct flow Expansion chambers for the Hdb/Hdp/Hdr/Tr  50, 68.
Comes with upgraded prings for the Exp-airchamber and fireing pin chamber
The Exp airchanbers will also allow you to run Hpa and comes with extended threads however the HPA attachment is sold separately or as a specific package (please search listings)