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Ships within 48 hours · Estimated delivery Jul 26 - Jul 31
offering the perfect balance of strength
1x RetroArms CNC Piston 19 Steel Teeth (SR25 Gearbox)
Gearbox Compatibility: Version 3 (AK AEG and similar)
Material: 7075 Aluminum (CNC)
Requires reinforced internals
RetroArms AEG Spring SiCr with Progressive Winding – M190 Receiver Kit offering the perfect balance ofThe 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
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