{"id":43789,"date":"2026-06-15T22:32:15","date_gmt":"2026-06-15T20:32:15","guid":{"rendered":"https:\/\/italytacticalshop.it\/product\/jefftron-leviathan-ngrs-optical-m4-rear-wiring\/"},"modified":"2026-06-15T22:32:15","modified_gmt":"2026-06-15T20:32:15","slug":"jefftron-leviathan-ngrs-optical-m4-rear-wiring","status":"publish","type":"product","link":"https:\/\/italytacticalshop.it\/en\/product\/jefftron-leviathan-ngrs-optical-m4-rear-wiring\/","title":{"rendered":"JeffTron LEVIATHAN NGRS Optical M4 (Rear Wiring)"},"content":{"rendered":"

Leviathan NGRS Optical control unit<\/strong> by JeffTron<\/strong> with rear wiring<\/strong>.<\/p>\n

Only for EBB guns by Tokyo Marui<\/strong> from the M4 Next-Generation Recoil Shock (NGRS)<\/strong> series.<\/p>\n

Also compatible with URGI, MK18, HK416, HK417<\/strong> and SCAR-L (MK16) \/ SCAR-H (MK17)<\/strong>.<\/p>\n

Bluetooth programming<\/strong> via JeffTron app (iOS \/ Android).<\/p>\n

RFTS system<\/strong> \u2013 realistic trigger feel.<\/p>\n

JeffTron Leviathan NGRS Optical<\/h5>\n

Leviathan NGRS Optical<\/strong> is an electronic ETU with Bluetooth<\/strong>, designed for installation in the NGRS gearbox<\/strong> by Tokyo Marui. Thanks to optical sensors<\/strong> for shot detection and fire selector, plus an ultra-short switch<\/strong> (only 0.13 mm), it allows for realistic hair trigger<\/strong> mode. The Real Feel Trigger System (RFTS)<\/strong> with a spring simulates the trigger resistance of a real firearm<\/strong> and adds reset after firing. With the JeffTron app<\/strong> you can configure fire modes, RoF, active braking, pre-cocking, virtual magazine<\/strong> and more. The input\/output ports<\/strong> support connecting external devices like flashlights, drum mags, or empty mag sensors. The unit is protected by conformal coating<\/strong>. It is compatible with the original bolt catch<\/strong> and retains the empty mag cut-off function<\/strong>. It’s also fully ready for brushless motors<\/strong> like Warhead. All app settings are saved in real time<\/strong> directly to the unit.<\/p>\n

Key features<\/h5>\n
    \n
  • Bluetooth programming<\/strong> via JeffTron mobile app (iOS\/Android including smartwatches)<\/li>\n
  • Empty magazine detection<\/strong> (using original bolt catch lever)<\/li>\n
  • Hair trigger<\/strong> \u2013 response at just 0.13 mm<\/li>\n
  • Real Feel Trigger System (RFTS)<\/strong> \u2013 spring resistance and trigger reset<\/li>\n
  • Optical sensors<\/strong> for both shot and selector position<\/li>\n
  • 9 fire modes<\/strong> including Binary Trigger and virtual magazine<\/li>\n
  • Active braking<\/strong> with adjustable strength<\/li>\n
  • Pre-cocking function<\/strong> for instant SEMI response<\/li>\n
  • Ready for Brushless motors<\/strong> (Warhead, T238, Specna Arms Dark Matter, etc.)<\/li>\n
  • Full wiring included<\/strong> with T-DEAN connector (required for power)<\/li>\n
  • Motor + output delay mode<\/strong> for powering accessories like drum mags, tracer units or bolt catch sensors<\/li>\n<\/ul>\n
    Technical specifications<\/h5>\n
      \n
    • Gearbox type:<\/strong> M4 NGRS (also known as TM SOPMOD)<\/li>\n
    • Programming:<\/strong> Bluetooth app (Android \/ iOS incl. smartwatches)<\/li>\n
    • Cycle detection:<\/strong> Optical sensor on piston gear<\/li>\n
    • Fire selector:<\/strong> Optical sensor with sticker<\/li>\n
    • Wiring:<\/strong> Teflon (AWG16 and AWG22)<\/li>\n
    • Voltage:<\/strong> 8.4\u201317 V (NiMH, LiPo, LiFe)<\/li>\n
    • Protection:<\/strong> Current, thermal, undervoltage<\/li>\n
    • RFTS support:<\/strong> Yes<\/li>\n
    • DSG gear support:<\/strong> Yes<\/li>\n
    • Accessory connectivity:<\/strong> Input and output port<\/li>\n<\/ul>\n
      Gearbox compatibility<\/h5>\n
        \n
      • Tokyo Marui M4 Next Generation<\/li>\n
      • Tokyo Marui M4 URGI Next Generation<\/li>\n
      • Tokyo Marui MK18 Next Generation<\/li>\n
      • Tokyo Marui HK416D Next Generation<\/li>\n
      • Tokyo Marui HK416 DELTA Next Generation<\/li>\n
      • Tokyo Marui HK416C Next Generation<\/li>\n
      • Tokyo Marui SCAR-L Next Generation<\/li>\n
      • Tokyo Marui SCAR-H Next Generation<\/li>\n
      • Tokyo Marui HK417 Next Generation<\/li>\n<\/ul>\n
        Package contents<\/h5>\n
          \n
        • Leviathan NGRS Optical with wiring<\/li>\n
        • Mounting screw and foam pads for gearbox<\/li>\n
        • 2\u00d7 cable holders<\/li>\n
        • Selector stickers and Leviathan decals<\/li>\n
        • Installation manual (English only)<\/li>\n<\/ul>\n
          Warnings<\/h5>\n
            \n
          • Installation requires advanced knowledge of how NGRS guns work.<\/li>\n
          • Strictly follow the manual instructions, including correct positioning of the gear sensor.<\/li>\n
          • Most common installation issues include incorrect sensor position, poorly applied selector sticker, and wrong piston gear height.<\/li>\n
          • The unit must be calibrated via the app before use (light level, shot cycle, selector positions).<\/li>\n
          • Download the English manual here.<\/li>\n
          • Compatible smartwatches: Apple Watch Series 3+, Samsung Galaxy Watch 4+, Google Pixel Watch, Mobvoi TicWatch Pro 5, Hublot Big Bang e Gen 3, TAG Heuer Connected Calibre E4, Montblanc Summit.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

            Leviathan NGRS Optical control unit by JeffTron with rear wiring. Only for EBB guns by Tokyo Marui from the M4 Next-Generation Recoil Shock (NGRS) series. Also compatible with URGI, MK18, HK416, HK417 and SCAR-L (MK16) \/ SCAR-H (MK17). Bluetooth programming via JeffTron app (iOS \/ Android). RFTS system \u2013 realistic trigger feel. JeffTron Leviathan NGRS […]<\/p>\n","protected":false},"featured_media":43790,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[250],"product_cat":[35],"product_tag":[],"class_list":["post-43789","product","type-product","status-publish","has-post-thumbnail","product_brand-jefftron","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\/43789","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=43789"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/media\/43790"}],"wp:attachment":[{"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/media?parent=43789"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/product_brand?post=43789"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/product_cat?post=43789"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/product_tag?post=43789"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}