{"product_id":"emg-retro-arms-cz-ver2-cnc-gearbox-shell","title":"EMG x Retro Arms CZ Billet CNC 8mm Ver.2 Gearbox Shell for M4 \/ M16 Series Airsoft AEG Rifles","description":"\u003cp data-start=\"603\" data-end=\"922\"\u003eWhen it comes to high-performance Airsoft internals, precision and durability are everything. The \u003cstrong data-start=\"701\" data-end=\"759\"\u003eEMG x Retro Arms CZ Billet CNC 8mm Ver.2 Gearbox Shell\u003c\/strong\u003e represents the ultimate upgrade for M4 and M16 series AEGs, combining advanced engineering with aerospace-grade materials for elite performance and reliability.\u003c\/p\u003e\n\u003cp data-start=\"924\" data-end=\"1098\"\u003eThis gearbox shell is not just an internal component—it’s the foundation of a precision-built rifle capable of handling extreme power, accuracy, and endurance on the field.\u003c\/p\u003e\n\u003chr data-start=\"1100\" data-end=\"1103\"\u003e\n\u003ch3 data-start=\"1105\" data-end=\"1158\"\u003e\u003cstrong data-start=\"1109\" data-end=\"1156\"\u003ePrecision CNC Machined from Billet Aluminum\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1160\" data-end=\"1521\"\u003eAt the core of this gearbox’s excellence lies its \u003cstrong data-start=\"1210\" data-end=\"1280\"\u003econstruction from a single solid block of EN AW 7075 T651 aluminum\u003c\/strong\u003e, a metal alloy widely used in aerospace and motorsport applications. Unlike cast or pot-metal gearboxes, this \u003cstrong data-start=\"1391\" data-end=\"1423\"\u003ebillet CNC machining process\u003c\/strong\u003e ensures perfect tolerances, incredible rigidity, and flawless alignment for gears and bearings.\u003c\/p\u003e\n\u003cp data-start=\"1523\" data-end=\"1746\"\u003eThis manufacturing method results in a gearbox shell that not only looks stunning but also performs beyond expectations—able to endure \u003cstrong data-start=\"1658\" data-end=\"1701\"\u003ehigh-stress builds running M160 springs\u003c\/strong\u003e without deformation, cracking, or fatigue.\u003c\/p\u003e\n\u003cp data-start=\"1748\" data-end=\"1910\"\u003eThe \u003cstrong data-start=\"1752\" data-end=\"1779\"\u003edurable anodized finish\u003c\/strong\u003e provides corrosion resistance and a sleek professional look while protecting the surface from wear during assembly and gameplay.\u003c\/p\u003e\n\u003chr data-start=\"1912\" data-end=\"1915\"\u003e\n\u003ch3 data-start=\"1917\" data-end=\"1965\"\u003e\u003cstrong data-start=\"1921\" data-end=\"1963\"\u003eEngineered for High-Performance Builds\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1967\" data-end=\"2257\"\u003eEvery millimeter of this gearbox shell has been optimized to support the demands of modern, high-speed, and high-torque setups. Key stress points around the cylinder window, gear posts, and screw locations have been \u003cstrong data-start=\"2183\" data-end=\"2227\"\u003ereinforced to prevent structural fatigue\u003c\/strong\u003e, even under extreme strain.\u003c\/p\u003e\n\u003cp data-start=\"2259\" data-end=\"2569\"\u003eAdditionally, \u003cstrong data-start=\"2273\" data-end=\"2306\"\u003epre-radiused cylinder windows\u003c\/strong\u003e have been integrated to \u003cstrong data-start=\"2331\" data-end=\"2365\"\u003edistribute impact force evenly\u003c\/strong\u003e, reducing stress fractures and prolonging the gearbox’s lifespan. Whether you’re running a high-RPS speed build or a heavy-duty DMR setup, the EMG x Retro Arms CZ Gearbox Shell can handle it with ease.\u003c\/p\u003e\n\u003chr data-start=\"2571\" data-end=\"2574\"\u003e\n\u003ch3 data-start=\"2576\" data-end=\"2618\"\u003e\u003cstrong data-start=\"2580\" data-end=\"2616\"\u003eQuick-Change Spring Guide System\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2620\" data-end=\"2845\"\u003eTuning your rifle has never been simpler. This Version 2 gearbox shell features a \u003cstrong data-start=\"2702\" data-end=\"2751\"\u003equick-change ball-bearing spring guide system\u003c\/strong\u003e, allowing you to swap springs in minutes without the need for complete gearbox disassembly.\u003c\/p\u003e\n\u003cp data-start=\"2847\" data-end=\"3162\"\u003eThis innovation saves time and frustration, enabling you to quickly adjust your rifle’s FPS to meet different field limits or environmental conditions. Whether you’re preparing for an indoor CQB match or an outdoor milsim event, the quick-change system makes your gearbox more versatile and field-ready than ever.\u003c\/p\u003e\n\u003chr data-start=\"3164\" data-end=\"3167\"\u003e\n\u003ch3 data-start=\"3169\" data-end=\"3219\"\u003e\u003cstrong data-start=\"3173\" data-end=\"3217\"\u003eOptimized for Efficiency and Maintenance\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"3221\" data-end=\"3521\"\u003eThe EMG x Retro Arms CZ Gearbox Shell includes \u003cstrong data-start=\"3268\" data-end=\"3292\"\u003edeeper wire channels\u003c\/strong\u003e along the base of the gearbox, designed to \u003cstrong data-start=\"3336\" data-end=\"3366\"\u003esimplify wiring management\u003c\/strong\u003e and keep your setup organized. This improvement ensures low-resistance electrical flow and reduces the risk of pinched or damaged wires during assembly.\u003c\/p\u003e\n\u003cp data-start=\"3523\" data-end=\"3818\"\u003eThe \u003cstrong data-start=\"3527\" data-end=\"3548\"\u003e8mm bearing setup\u003c\/strong\u003e further enhances mechanical efficiency, minimizing friction between gears and improving overall cycling smoothness. Combined with precision-machined tolerances, these design choices result in \u003cstrong data-start=\"3741\" data-end=\"3815\"\u003equieter operation, improved consistency, and reduced wear on internals\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr data-start=\"3820\" data-end=\"3823\"\u003e\n\u003ch3 data-start=\"3825\" data-end=\"3880\"\u003e\u003cstrong data-start=\"3829\" data-end=\"3878\"\u003eBuilt to Last – Tested for Extreme Durability\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"3882\" data-end=\"4233\"\u003eTo validate its engineering excellence, each EMG x Retro Arms CZ gearbox undergoes \u003cstrong data-start=\"3965\" data-end=\"3993\"\u003eextensive stress testing\u003c\/strong\u003e using \u003cstrong data-start=\"4000\" data-end=\"4016\"\u003eM160 springs\u003c\/strong\u003e, one of the highest tension levels used in Airsoft tuning. Even after repeated cycles, there were \u003cstrong data-start=\"4115\" data-end=\"4175\"\u003eno signs of cracking, deformation, or mechanical fatigue\u003c\/strong\u003e—a true testament to its unmatched structural integrity.\u003c\/p\u003e\n\u003cp data-start=\"4235\" data-end=\"4413\"\u003eThis gearbox shell also utilizes \u003cstrong data-start=\"4268\" data-end=\"4304\"\u003estainless steel connecting bolts\u003c\/strong\u003e, further reinforcing its strength and ensuring all components remain perfectly aligned over long-term use.\u003c\/p\u003e\n\u003chr data-start=\"4415\" data-end=\"4418\"\u003e\n\u003ch3 data-start=\"4420\" data-end=\"4465\"\u003e\u003cstrong data-start=\"4424\" data-end=\"4463\"\u003ePremium Design and Aesthetic Appeal\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"4467\" data-end=\"4803\"\u003eBeyond its technical performance, the EMG x Retro Arms CZ Gearbox Shell stands out with \u003cstrong data-start=\"4555\" data-end=\"4594\"\u003eprecision engraving of the EMG logo\u003c\/strong\u003e, showcasing the collaboration between two of Airsoft’s most innovative brands. The sleek anodized surface not only enhances durability but also gives your internal build a professional, high-end appearance.\u003c\/p\u003e\n\u003chr data-start=\"4805\" data-end=\"4808\"\u003e\n\u003ch3 data-start=\"4810\" data-end=\"4835\"\u003e\u003cstrong data-start=\"4814\" data-end=\"4833\"\u003eSpecifications:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"4836\" data-end=\"5262\"\u003e\n\u003cli data-start=\"4836\" data-end=\"4877\"\u003e\n\u003cp data-start=\"4838\" data-end=\"4877\"\u003e\u003cstrong data-start=\"4838\" data-end=\"4855\"\u003eManufacturer:\u003c\/strong\u003e EMG x Retro Arms CZ\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4878\" data-end=\"4987\"\u003e\n\u003cp data-start=\"4880\" data-end=\"4987\"\u003e\u003cstrong data-start=\"4880\" data-end=\"4898\"\u003eCompatibility:\u003c\/strong\u003e Tokyo Marui, G\u0026amp;P, Matrix, and other M4 \/ M16 AEGs (minor modification may be required)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4988\" data-end=\"5041\"\u003e\n\u003cp data-start=\"4990\" data-end=\"5041\"\u003e\u003cstrong data-start=\"4990\" data-end=\"5003\"\u003eMaterial:\u003c\/strong\u003e CNC Billet EN AW 7075 T651 Aluminum\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5042\" data-end=\"5067\"\u003e\n\u003cp data-start=\"5044\" data-end=\"5067\"\u003e\u003cstrong data-start=\"5044\" data-end=\"5061\"\u003eBearing Size:\u003c\/strong\u003e 8mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5068\" data-end=\"5108\"\u003e\n\u003cp data-start=\"5070\" data-end=\"5108\"\u003e\u003cstrong data-start=\"5070\" data-end=\"5081\"\u003eFinish:\u003c\/strong\u003e Durable Anodized Coating\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5109\" data-end=\"5229\"\u003e\n\u003cp data-start=\"5111\" data-end=\"5229\"\u003e\u003cstrong data-start=\"5111\" data-end=\"5124\"\u003eFeatures:\u003c\/strong\u003e Quick-Change Spring Guide, Reinforced Stress Points, Pre-Radiused Cylinder Windows, Deep Wire Channels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5230\" data-end=\"5262\"\u003e\n\u003cp data-start=\"5232\" data-end=\"5262\"\u003e\u003cstrong data-start=\"5232\" data-end=\"5241\"\u003eLogo:\u003c\/strong\u003e EMG Laser Engraved\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"5264\" data-end=\"5267\"\u003e\n\u003ch3 data-start=\"5269\" data-end=\"5339\"\u003e\u003cstrong data-start=\"5273\" data-end=\"5337\"\u003eProfessional Grade Build – Recommended for Expert Installers\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"5340\" data-end=\"5609\"\u003eDue to the precision tolerances of this gearbox, \u003cstrong data-start=\"5389\" data-end=\"5433\"\u003eprofessional installation is recommended\u003c\/strong\u003e to ensure perfect fitment with your AEG’s internals. While designed for maximum compatibility with M4 and M16 platforms, some brands may require minor fitting or adjustment.\u003c\/p\u003e\n\u003chr data-start=\"5611\" data-end=\"5614\"\u003e\n\u003ch3 data-start=\"5616\" data-end=\"5651\"\u003e\u003cstrong data-start=\"5620\" data-end=\"5649\"\u003eAbout EMG x Retro Arms CZ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"5653\" data-end=\"6014\"\u003e\u003cstrong data-start=\"5653\" data-end=\"5688\"\u003eEMG (Evike Manufacturing Group)\u003c\/strong\u003e and \u003cstrong data-start=\"5693\" data-end=\"5710\"\u003eRetro Arms CZ\u003c\/strong\u003e have joined forces to redefine Airsoft engineering standards. Retro Arms, known for its precision CNC machining and military-grade designs, and EMG, renowned for bringing premium performance parts to the market, together deliver \u003cstrong data-start=\"5940\" data-end=\"6012\"\u003ea gearbox shell that embodies innovation, precision, and durability.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"6016\" data-end=\"6125\"\u003eTheir shared mission: to give Airsoft players the confidence to push their builds further than ever before.\u003c\/p\u003e\n","brand":"EMG","offers":[{"title":"Default Title","offer_id":47994901692646,"sku":"38256","price":178.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0793\/6393\/2390\/files\/3542_emg-38256a.jpg?v=1784175291","url":"https:\/\/ngrwzj-i1.myshopify.com\/products\/emg-retro-arms-cz-ver2-cnc-gearbox-shell","provider":"CQC Airsoft ","version":"1.0","type":"link"}