{"id":14645,"date":"2026-06-14T05:47:12","date_gmt":"2026-06-14T03:47:12","guid":{"rendered":"https:\/\/italytacticalshop.it\/product\/sa-aether-v2-m4-completed-gearbox-hal-etu-8-mm-black\/"},"modified":"2026-06-15T14:45:28","modified_gmt":"2026-06-15T12:45:28","slug":"sa-aether-v2-m4-completed-gearbox-hal-etu-8-mm-black","status":"publish","type":"product","link":"https:\/\/italytacticalshop.it\/en\/product\/sa-aether-v2-m4-completed-gearbox-hal-etu-8-mm-black\/","title":{"rendered":"SA \u00c6THER\u2122 V2 \/ M4 Completed Gearbox HAL\u2122 ETU (8 mm) – Black"},"content":{"rendered":"

Complete \u00c6THER\u2122 V2 \/ M4 gearbox with HAL\u2122 ETU unit<\/strong> from Specna Arms<\/strong> in black<\/strong>.<\/p>\n

Premium base for PRIME\u2122 M4 and MK18 rifles.<\/strong><\/p>\n

Extremely durable reinforced shell<\/strong> patented in the EU.<\/p>\n

CNC upgraded internal parts<\/strong> for maximum performance.<\/p>\n

HAL\u2122 ETU unit<\/strong> for lightning trigger response and advanced firing modes.<\/p>\n

QSC ESA2 quick spring change<\/strong>.<\/p>\n

Technical Specifications<\/h5>\n
    \n
  • Type:<\/strong> Gearbox V2<\/li>\n
  • Gears:<\/strong> CNC steel, ratio 16:1<\/li>\n
  • Bearings:<\/strong> 8mm J-Cage (ball + slide)<\/li>\n
  • Piston:<\/strong> Polycarbonate, 14 teeth<\/li>\n
  • Piston head:<\/strong> CNC aluminium<\/li>\n
  • Cylinder head:<\/strong> CNC aluminium, double sealing<\/li>\n
  • Cylinder:<\/strong> Stainless, ribbed<\/li>\n
  • Nozzle:<\/strong> CNC aluminium<\/li>\n
  • ETU unit:<\/strong> HAL\u2122 ETU<\/li>\n
  • Recommended battery:<\/strong> 11.1V Li-Po<\/li>\n
  • Connector:<\/strong> T-Dean (rear wiring)<\/li>\n
  • Functions:<\/strong> Active brake, pre-cocking (6 levels), trigger sensitivity (5 levels), binary mode, 3\/5-round bursts<\/li>\n
  • Weight:<\/strong> 525 g<\/li>\n<\/ul>\n
    Package Contents<\/h5>\n
      \n
    • Complete \u00c6THER\u2122 V2 gearbox<\/li>\n
    • HAL\u2122 ETU electronic unit<\/li>\n
    • Selector plate<\/li>\n<\/ul>\n

      Important notice before using the rifle<\/strong><\/p>\n

      To fire the rifle, the HAL ETU unit must be activated using the exact steps below \u2013 otherwise the rifle will not respond after connecting the battery:<\/strong><\/p>\n

        \n
      1. Switch the fire selector to SAFE.<\/strong><\/li>\n
      2. Connect the battery and wait 3 seconds until the beep sounds.<\/strong><\/li>\n
      3. Press and hold the trigger for 5 seconds until another beep sounds.<\/strong><\/li>\n
      4. The rifle is now ready to use.<\/strong><\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"

        Complete \u00c6THER\u2122 V2 \/ M4 gearbox with HAL\u2122 ETU unit from Specna Arms in black. Premium base for PRIME\u2122 M4 and MK18 rifles. Extremely durable reinforced shell patented in the EU. CNC upgraded internal parts for maximum performance. HAL\u2122 ETU unit for lightning trigger response and advanced firing modes. QSC ESA2 quick spring change. Technical […]<\/p>\n","protected":false},"featured_media":14646,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[135],"product_cat":[503,505,35],"product_tag":[],"class_list":["post-14645","product","type-product","status-publish","has-post-thumbnail","product_brand-specna-arms","product_cat-ingranaggi-e-gearbox","product_cat-mosfet-e-centraline","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\/14645","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=14645"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/media\/14646"}],"wp:attachment":[{"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/media?parent=14645"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/product_brand?post=14645"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/product_cat?post=14645"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/product_tag?post=14645"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}