Prometheus Hard Piston New V.2 for Tokyo Marui SOPMOD/M4

Tough – High quality – 4 Metal Release teeth – Second tooth mod as standard

A very high quality piston from Prometheus.  This is best used with a matching Prometheus piston head and cylinder head to minimize any potential need for AOE adjustments.  Its low resistance and high strength.  Fairly well stocked piston which is very popular.

It is very difficult for this piston to fail, however the large majority of these fails will come from bad AoE (angle of engagement) if you are unsure of how to correct this please consult a tech.