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Prometheus Non-Liner Irragular Pitch Airsoft AEG Upgrade Spring (M135 / 430~530 FPS)

2 Customer Reviews

by jacob p. on 02/08/2014
"very good spring! with a JG blue motor and a hefty 9.6 you can run it fine. (with a sorbo and upgraded gears. im running SHS) if you want a higher FPS this is the spring!!!!!!!!!!!!!!!!!
by Taylor P. on 01/13/2014
"Good spring! I installed this in my DMR Barrett and it is getting 480fps +or- 3 FPS W/.2g bbs. Overall very impressed, but it is a pain to install.