Systema Taper Spring 300% for PSG-1 AEG

Systema Taper Spring 300% for PSG-1 AEG Made with Oil Tamper Wire Irregular Pitch Spring 100% Japan made Upgrade Spring Design for Marui's PSG-1 Airsoft AEG Actual results depend on barrel length, workmanship, air nozzle seal, and other technical factors Upgraded Power Level: Ultra High Power Upgraded Power Range: 480 - 530 FPS