RetroArms AEG Spring SiCr with Progressive Winding – M120 ZERO SHOCK 5N Thrust Force) – Easily

5N Thrust Force) – Easily handles heavy spring magazines without struggle

Dual O-rings to ensure consistent air seal

1x Maxx Model CNC Aluminum Advanced Speed Trigger (Style B) (Silver)

Thread compatibility: 14 mm CCW (verify your build)

Perfect for both maintenance and performance builds

RetroArms AEG Spring SiCr with Progressive Winding – M120 ZERO SHOCK 5N Thrust Force) – EasilyThe RetroArms AEG Spring SiCr M120 is a high performance upgrade spring designed to deliver consistent FPS output, smooth compression, and long lasting reliability. Made from Silicon Chromium (SiCr) alloy steel, this spring offers enhanced durability and resistance to fatigue, even in high RPS setups. Its progressive winding design ensures a gentler initial compression for smoother gearbox operation and reduced stress on internal components, while