HEAT CORE Upgrade Kit for M-Series Blowback (NO receiver)

This new upgrade kit is for owners who have the MILSIG Paradigm and want to get the benefits of our new revolutionary HEAT core system. With the new HEAT core, maintenance is much simpler with only the removal of 2 pins to completely remove the internals of the marker. Also removed now is the need for the side air hose. The upgrade kit consists of our new HEAT core, the instruction manual for the new HEAT core, and a plug for the bottom air feed. You just have to remove the old power tube, hammer, cocking handle, and side air hose and block, and install the new HEAT core. The 13 CI stock and guide rail can also be reused on the upgrade kit.