{"product_id":"mechlabs-xx-mod-fully-mechanical-hpa-engine-for-v2-gearbox","title":"MechLabs XX-Mod Fully Mechanical HPA Engine for V2 Gearbox","description":"\u003cdiv style=\"background: #edfaf1; border-left: 4px solid #27ae60; padding: 12px 16px; border-radius: 0 6px 6px 0; margin: 0 0 16px; font-size: 13px;\"\u003e\n\u003cstrong style=\"color: #1a6b3a;\"\u003eMechLabs XX-Mod Fully Mechanical HPA Engine for V2 Gearbox — \u003c\/strong\u003e MechLabs XX-Mod — a fully mechanical HPA engine with zero electronics, zero solenoids and zero batteries. Drop-in replacement for any standard V2 AEG gearbox. The engine that powers Archwick's licensed B\u0026amp;T APC9 HPA series.\u003c\/div\u003e\n\u003cp\u003eThe XX-Mod is the next generation of MechLabs' mechanical HPA platform, evolving the NEXXUS design that the brand built its reputation on. The headline change is in how it handles air: a newly engineered XX-Mold bolt assembly with an adjustable nozzle synchronises the internal air-cycle rate to the configured nozzle length. The result is reduced air consumption per shot, better burst stability with low-flow regulators, and noticeably tighter shot-to-shot grouping. It's also cross-compatible with existing NEXXUS and ARC owners who want the bolt upgrade alone.\u003c\/p\u003e\n\u003cp\u003eWhat makes a fully mechanical engine appealing isn't speed — the XX-Mod isn't trying to compete with solenoid engines on raw ROF. It's about everything that goes wrong with electronics. No FCU to fail, no solenoid coils to burn out, no wiring loom to short, no firmware to update, no battery voltage to monitor. The trigger pull mechanically cycles the bolt and fires the BB. The engine is 100% waterproof and will operate fully submerged — relevant for UK winter games and outdoor sites that get genuinely wet.\u003c\/p\u003e\n\u003cp\u003eConstruction is CNC-milled Aluminium Series 6 throughout the engine block, with a precision lock-fit interface between modular sections so the engine can be partially disassembled for servicing without losing alignment. A 3-axis XYZ alignment system inside the block compensates for receiver tolerance differences, which means the engine fits cleanly into virtually any V2 shell — G\u0026amp;G, Specna Arms, Krytac, Tokyo Marui, VFC, ICS, KWA and similar. The trigger uses a magnetic return mechanism with adjustable travel and sensitivity for a crisp, repeatable feel.\u003c\/p\u003e\n\u003cp\u003eChoose from nine anodised finishes. The Black and Grey options keep the visual profile of a stock gearbox; the coloured options (Blue, Green, Red, Purple, Pink, Teal, Gold) work well for skirmish builds where the engine is partially visible through a cut-out lower receiver or for tournament setups where finish matching is part of the build. Functionally identical across all nine colours — the anodising is cosmetic.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 16px; color: #1b3a6b; margin: 18px 0 8px;\"\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 13px; margin: 0 0 18px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #1B3A6B; color: #fff;\"\u003e\n\u003cth style=\"padding: 7px 12px; text-align: left;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"padding: 7px 12px; text-align: left;\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eEngine type\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eFully mechanical HPA — zero electronics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003ePlatform\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eV2 gearbox AEG (M4 \/ AR-15 style)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eCNC-milled Aluminium Series 6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eTrigger\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eMagnetic return — adjustable travel \u0026amp; sensitivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eBolt system\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eXX-Mold — adjustable nozzle for chamber fit \u0026amp; air-cycle sync\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eAir efficiency\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eReduced consumption per shot vs. previous NEXXUS \/ ARC generations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eWaterproof\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003e100% — operates fully submerged\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eAlignment\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003e3-axis XYZ adjustment for cross-receiver compatibility\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eModularity\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eBlock-section design with precision lock-fit interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eCross-compatibility\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eXX-Mold bolt fits NEXXUS and ARC engines as an upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003ePower requirement\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eHPA tank and regulator (sold separately) — no battery needed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px; border: 1px solid #eee;\"\u003eAnodised — 9 colour options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"background: #fff8dc; border-left: 4px solid #f4b400; padding: 10px 14px; border-radius: 0 6px 6px 0; font-size: 13px; margin: 14px 0;\"\u003e⚠ \u003cstrong\u003eMechanically adjustable system:\u003c\/strong\u003e extreme tuning settings can cause irregular cycling. Make small, incremental adjustments and re-test between each. If you're new to mechanical HPA, our \u003ca style=\"color: #1b3a6b;\" href=\"\/pages\/hpa-tech-service\"\u003eHPA tech team\u003c\/a\u003e can install and tune the XX-Mod for you.\u003c\/div\u003e\n\u003cdiv style=\"background: #1B3A6B; color: #fff; padding: 12px 16px; border-radius: 6px; margin: 18px 0 0; font-size: 13px;\"\u003e\n\u003cstrong style=\"color: #fff;\"\u003e💡 Titan Forge Airsoft tip:\u003c\/strong\u003e The XX-Mod is the same engine architecture that powers the \u003ca style=\"color: #cdd6f4;\" href=\"\/collections\/hpa-rifles\"\u003eArchwick B\u0026amp;T APC9 HPA series\u003c\/a\u003e — if you've handled an APC9 mechanical HPA and liked the trigger feel, the XX-Mod brings that same response to your existing M4 AEG. Pair with a \u003ca style=\"color: #cdd6f4;\" href=\"\/collections\/hpa-regulators\"\u003equality regulator\u003c\/a\u003e for best results.\u003c\/div\u003e","brand":"Titan Forge Airsoft","offers":[{"title":"Black","offer_id":55566027882872,"sku":"4173615821","price":389.95,"currency_code":"GBP","in_stock":false},{"title":"Blue","offer_id":55566027915640,"sku":"1132407097","price":389.95,"currency_code":"GBP","in_stock":true},{"title":"Gold","offer_id":55566027948408,"sku":"8798801747","price":389.95,"currency_code":"GBP","in_stock":false},{"title":"Grey","offer_id":55566027981176,"sku":"9681973963","price":389.95,"currency_code":"GBP","in_stock":true},{"title":"Green","offer_id":55566028013944,"sku":"3038666459","price":389.95,"currency_code":"GBP","in_stock":false},{"title":"Pink","offer_id":55566028046712,"sku":"9509431557","price":389.95,"currency_code":"GBP","in_stock":false},{"title":"Purple","offer_id":55566028079480,"sku":"5141531417","price":389.95,"currency_code":"GBP","in_stock":false},{"title":"Red","offer_id":55566028112248,"sku":"3897526551","price":389.95,"currency_code":"GBP","in_stock":false},{"title":"Teal","offer_id":55566028145016,"sku":"5652558490","price":389.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0562\/8097\/3450\/files\/MechLabsXX-ModFullyMechanicalHPAEngine-TitanForgeAirsoft-Parent_74647729-7a29-43d8-b0e5-e5a9031fceb1.png?v=1779263931","url":"https:\/\/www.titanforgeairsoft.com\/products\/mechlabs-xx-mod-fully-mechanical-hpa-engine-for-v2-gearbox","provider":"Titan Forge Airsoft","version":"1.0","type":"link"}