Features:

• Made with high strength steel wire
• Variable tension reduces mechanical stress in gearbox
• Enhanced durability and longevity
• Compatible in any airsoft AEG gearboxes

FPS Ratings:

FPS estimate based on average power output. Exact FPS result may vary based on alignment, installation, inner barrel, cylinder and other factors. Stronger AEG springs may require additional reinforcement in gearbox / internal components to maintain performance. Higher power batteries are required to properly cycle higher FPS springs.

• M85 = 250 - 300 FPS
• M90 = 280 - 340 FPS
• M100 = 320 - 360 FPS
• M110 = 350 - 400 FPS
• M120 = 380 - 450 FPS
• M130 = 420 - 500 FPS
• M140 = 450 - 550 FPS
• M150 = 500 - 600 FPS
• M170 = 550 - 700 FPS