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    RetroArms AEG Spring SiCr with Progressive Wiring - M130

RetroArms AEG Spring SiCr with Progressive Wiring - M130

Ft10.64
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Retro Arms has come out with another piece that helps you build an upgraded beast exactly to your specifications.

A quality spring of standard length with progressive winding for AEG gearboxes, rated at M130.

Progressive (variable) winding makes the spring easier to compress.

Made from valve wire alloyed with silicon and chromium (SiCr).

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Retro Arms Spring for AEG Rifles

The spring is a fundamental part of the gearbox because its strength, along with the air seal, affects the overall performance of the rifle. Low-quality springs, although they often have above-average performance compared to their rated value, quickly lose their stiffness, shorten, or in extreme cases, can break (due to storing the rifle with a compressed spring or in a pre-cocked state).
From the workshop of Retro Arms, famous for their quality CNC gearboxes, comes another finely tuned upgrade part: a high-quality spring made from valve wire alloyed with silicon and chromium (SiCr) that retains its stiffness after thousands of shots and does not deform.
Progressive (variable) winding makes the compression easier in the first phase of the piston movement while not reducing the performance. The outer diameter of the spring is 14.5 mm.
The rated value of M120 corresponds to a speed of 120 m/s with an average barrel length. With a good air seal or a longer barrel, the performance will be higher.

Installation

When installing a spring with progressive winding, the compressed part (where the coils are closer together) goes on the spring guide. Retro Arms marked this spot with color for easy identification of the spring strength (see below).

Retro Arms Spring Stiffness and Their Color Coding

  • M100 - yellow
  • M110 - orange
  • M120 - red
  • M130 - purple
  • M140 - blue
  • M150 - green
  • M190 - pink

Retro Arms AEG Spring Range

  • for standard AEG gearboxes
  • for PSG/SR25 (extended gearboxes)
  • for Marui NGRS (shortened springs for EBB rifles from Tokyo Marui)
8815

Specific References

UPC
8815
EAN13
8815

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