The Prometheus High Cycle Hard Piston is optimized for high rates of fire and improved response while upping the metal teeth from one to seven metal teeth

finned barrel and signature Cutts Compensator

and dual injection molding

Functioned to minimize loss of compressions with the double o-ring rubber seals system

CowCow AAP01 150% Recoil Spring Airsoft MP7 The Prometheus High Cycle HardAAP01 150% Recoil Spring Highlighted features AAP01 Recoil Spring is made of high strength spring steel. Its short length design with 2 different tensioned coil zone can enhance the efficiency of recoil cycling. Also it can improve the recoil control and make easier handling on blow back cycling. For Action Army AAP01 **Important Notice** It may has a condition that your pistol cannot feed the BB bullet due to lightweight gas supply. You just simple