Prometheus EG Spring Guide / Smoother New Ver.2

The Prometheus EG Spring Guide / Smoother New Ver.2 is compatible with airsoft replicas such as the new versions of Tokyo marui M4 and HK416/417.

Due to the rotating parts in this spring guide, it ensures that there is minimal friction and thus the performance of the spring remains optimal. Please note, not compatible with Next Gen SCAR SCAR series/AK series and G36 series.