RetroArms AEG Spring SiCr with Progressive Winding – M190 Receiver Kit and DMR builds

and DMR builds

Requires reinforced internals

and resistance to fatigue — even in long-term high-stress conditions

offering the perfect balance of strength

Gearbox Compatibility: Version 3 (AK AEG and similar)

RetroArms AEG Spring SiCr with Progressive Winding – M190 Receiver Kit and DMR buildsThe 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