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00mm) is designed to maximize air seal efficiency
Professional installation recommended for competition setups
improving gearbox efficiency and extending the service life of your internal components
Color: Titanium (anodized finish)
Made from 7075 aircraft-grade aluminum — lightweight and extremely durable
RetroArms AEG Spring SiCr with Progressive Winding – M150 Blowback Units 00mm) is designed to maximizeThe RetroArms AEG Spring SiCr M150 is a high power upgrade spring crafted for serious airsoft builds that demand maximum muzzle velocity and spring strength. Made from Silicon Chromium (SiCr) alloy steel, this M150 rated spring delivers outstanding durability, resistance to fatigue, and reliable FPS output under heavy tension. Its progressive winding design ensures a smoother start during compression, reducing initial stress on gears and motor while
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