Prometheus Wide Use 'EG GEAR' Standard Cycle (Ratio 18 :1) for Marui/ G&G / Krytac AEG

Prometheus Wide Use 'EG GEAR' Standard Cycle (Ratio 18 :1) for Marui/ G&G / Krytac AEG Metal Construction High Cycle (18:1 ratio) Suitable for Tokyo Marui/ G&G/ Krytac AEG Rifle