{"id":25575,"date":"2026-06-14T18:25:32","date_gmt":"2026-06-14T16:25:32","guid":{"rendered":"https:\/\/italytacticalshop.it\/product\/retroarms-aeg-spring-sicr-with-progressive-wiring-m100\/"},"modified":"2026-06-14T18:25:32","modified_gmt":"2026-06-14T16:25:32","slug":"retroarms-aeg-spring-sicr-with-progressive-wiring-m100","status":"publish","type":"product","link":"https:\/\/italytacticalshop.it\/en\/product\/retroarms-aeg-spring-sicr-with-progressive-wiring-m100\/","title":{"rendered":"RetroArms AEG Spring SiCr with Progressive Wiring \u2013 M100"},"content":{"rendered":"

Retro Arms<\/strong> has come out with another piece that helps you build an upgraded beast<\/strong> exactly to your specifications.<\/p>\n

A quality spring of standard length<\/strong> with progressive winding for AEG<\/strong> gearboxes, rated at M100.<\/strong><\/p>\n

Progressive (variable) winding<\/strong> makes the spring easier to compress.<\/span><\/p>\n

Made from valve wire alloyed with silicon and chromium (SiCr).<\/strong><\/span><\/p>\n

Retro Arms Spring for AEG Rifles<\/h5>\n

The spring is a fundamental part of the gearbox<\/strong> because its strength, along with the air seal, affects the overall performance<\/strong> 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<\/strong>, famous for their quality CNC gearboxes<\/strong>, comes another finely tuned upgrade part: a high-quality spring made from valve wire alloyed with silicon and chromium (SiCr)<\/strong> 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<\/strong> while not reducing the performance. The outer diameter of the spring is 14.5 mm.
<\/strong>The rated value of M120 corresponds to a speed of 120 m\/s<\/strong> with an average barrel length. With a good air seal<\/strong> Now longer barrel<\/strong>, the performance will be higher.<\/strong><\/p>\n

Installation<\/h5>\n

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

Retro Arms Spring Stiffness and Their Color Coding<\/h5>\n
    \n
  • M100 \u2013 yellow<\/span><\/li>\n
  • M110 \u2013 orange<\/span><\/li>\n
  • M120 \u2013 red<\/span><\/li>\n
  • M130 \u2013 purple<\/span><\/li>\n
  • M140 \u2013 blue<\/span><\/li>\n
  • M150 \u2013 green<\/span><\/li>\n
  • M190 \u2013 pink<\/span><\/li>\n<\/ul>\n
    Retro Arms AEG Spring Range<\/h5>\n
      \n
    • for AEG standards<\/strong> gearboxes<\/li>\n
    • for PSG\/SR25<\/strong> (extended gearboxes)<\/li>\n
    • for Marui NGRS<\/strong> (shortened springs for EBB rifles from Tokyo Marui)<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      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 M100. Progressive (variable) winding makes the spring easier to compress. Made from valve wire alloyed with silicon and chromium (SiCr). Retro Arms […]<\/p>\n","protected":false},"featured_media":25576,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[201],"product_cat":[35],"product_tag":[],"class_list":["post-25575","product","type-product","status-publish","has-post-thumbnail","product_brand-retroarms","product_cat-ricambi-e-interni-accessori-arma","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/product\/25575","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/comments?post=25575"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/media\/25576"}],"wp:attachment":[{"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/media?parent=25575"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/product_brand?post=25575"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/product_cat?post=25575"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/product_tag?post=25575"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}