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Ships within 48 hours · Estimated delivery Aug 30 - Sep 4
Featuring CNC-machined aluminum construction
Designed specifically for TM NGRS MP5
1x Set of O-rings
Front and rear serrations for improved handling and control
RetroArms AEG Spring SiCr with Progressive Winding – M140 Maxx Model Featuring CNC-machined aluminum constructionThe RetroArms AEG Spring SiCr M140 is a heavy duty upgrade spring engineered for high powered AEG builds requiring maximum performance and consistency. Manufactured from Silicon Chromium (SiCr) spring steel, it offers exceptional durability, resistance to deformation, and long lasting elasticity under intense mechanical stress. Its progressive winding design starts with a lighter compression rate and increases toward the end of the cycle, reducing
