-M100 spring, steel gears, 8mm ball bearings, aluminum cylinder, aluminum cylinder head with double o-rings and impact pad, reinforced nylon fiber piston with steel teeth, aluminum one way piston head with bearings and double o-ring, aluminum spring guide with steel bearings, POM nozzle with internal o-ring, high temperature wires

- Free M120 spring on the side

- For G36 series AEG