RetroArms AEG Spring SiCr with Progressive Winding – M190 Receiver Kit and consistent trigger pull for

and consistent trigger pull for competitive Hi-Capa builds

Requires reinforced internals

Made from SiCr (Silicon-Chromium) steel for long-term resilience and consistency

1x Retention spring

and DMR builds

RetroArms AEG Spring SiCr with Progressive Winding – M190 Receiver Kit and consistent trigger pull forThe RetroArms AEG Spring SiCr M190 is a high tension performance spring designed for the most demanding airsoft builds. Constructed from premium Silicon Chromium (SiCr) spring steel, this M190 rated spring delivers extreme FPS output, outstanding durability, and resistance to fatigue even in long term high stress conditions. With its progressive winding design, the spring compresses more smoothly at the start, helping reduce initial gear strain and