{"product_id":"airtac-hpa-adapter-hi-capa-to-m4","title":"AirTac HPA Adapter — Hi-Capa to M4 Magazine","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;\"\u003e💨 AirTac's entry-point Hi-Capa HPA adapter — lifetime warranty included.\u003c\/strong\u003e Converts your Hi-Capa GBB to run on HPA with M4 AEG magazines. Clean plug-and-play installation, injection-moulded polymer body engineered for consistent alignment, US Foster HPA fitting as standard. At £39.95, this is the most accessible route to HPA performance on a Hi-Capa platform.\u003c\/div\u003e\n\n\u003cp\u003eHPA adapters give Hi-Capa players what gas magazines fundamentally cannot: shot-to-shot FPS consistency regardless of temperature, effectively unlimited capacity through standard M4 magazines, and the ability to dial in your output pressure precisely for any site limit. The AirTac Hi-Capa to M4 adapter is designed as a clean, no-fuss entry into this — slot it into your Hi-Capa magwell, connect your HPA line, load an M4 magazine, and you have a properly HPA-fed pistol.\u003c\/p\u003e\n\n\u003cp\u003eAirTac's injection-moulded polymer body is designed for stable fitment and consistent alignment between pistol, adapter, and magazine during active use — a detail that matters for reliable feeding and air seal. This isn't an afterthought on construction; misalignment between the adapter body and the pistol nozzle is one of the most common causes of poor performance with budget HPA adapters. The US Foster fitting is the industry standard for airsoft HPA, compatible with all mainstream HPA lines and regulators.\u003c\/p\u003e\n\n\u003cp\u003eEvery AirTac adapter comes with a lifetime warranty — a genuine commitment from a company that manufactures its own products and backs them with spare parts support.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eWhat you need to run this adapter\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:13px;margin:0 0 18px;\"\u003e\n  \u003ctr style=\"background:#1B3A6B;color:#fff;\"\u003e\n\u003cth style=\"padding:7px 12px;text-align:left;\"\u003eItem\u003c\/th\u003e\n\u003cth style=\"padding:7px 12px;text-align:left;\"\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eHPA tank\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eAny paintball\/airsoft HPA tank — see \u003ca href=\"\/collections\/hpa-tanks\" style=\"color:#1B3A6B;\"\u003eHPA Tanks\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eSecondary regulator\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003e\n\u003ca href=\"\/products\/airtac-at200-regulator\" style=\"color:#1B3A6B;\"\u003eAirTac AT200\u003c\/a\u003e or equivalent — always required; never connect direct to tank regulator alone\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eHPA line\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eUS Foster fitting line — see \u003ca href=\"\/collections\/hpa-lines\" style=\"color:#1B3A6B;\"\u003eHPA Lines\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eM4 AEG magazine\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003ePTS EPM\/EPM1 recommended; strong spring essential\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\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  \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;\"\u003eBody material\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eInjection-moulded polymer\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eHPA fitting\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eUS Foster (standard airsoft fitting)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eRecommended operating pressure\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003e~120psi (green gas equivalent); max 140psi\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eCompatible platforms\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eHi-Capa GBB pistols (WE, TM, SSP5 and compatible variants)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eMagazine compatibility\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eStandard M4 AEG magazines\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eLifetime warranty (AirTac)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003ePackage Contents\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:13px;margin:0 0 18px;\"\u003e\n  \u003ctr style=\"background:#1B3A6B;color:#fff;\"\u003e\n\u003cth style=\"padding:7px 12px;text-align:left;\"\u003eItem\u003c\/th\u003e\n\u003cth style=\"padding:7px 12px;text-align:left;\"\u003eQty\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eAirTac Hi-Capa to M4 HPA Adapter\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eUsage Tips\u003c\/h2\u003e\n\u003cp\u003eSet your secondary regulator to approximately 120psi to replicate green gas operating conditions on your Hi-Capa's internals. This is the correct starting pressure — adjust up or down slightly to reach your desired FPS on chrono. Never exceed 140psi; beyond this pressure, internal wear on nozzles, O-rings, and hop-up rubbers accelerates significantly. Always rack the slide before inserting the adapter to bring the nozzle forward into the sealing position. Use high-quality M4 magazines with strong springs — the magazine spring is responsible for pushing BBs up into the adapter's feed system, and a weak spring is the most common cause of double-feeds or misfeeds.\u003c\/p\u003e\n\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 This is the most affordable route to HPA performance on a Hi-Capa at £39.95. If you want the additional build quality of a CNC alloy mag release and a heavier glass-nylon body, the \u003ca href=\"\/products\/ctm-hi-capa-hpa-m4-magazine-adapter-parent\" style=\"color:#cdd6f4;\"\u003eCTM Hi-Capa adapter at £55.00\u003c\/a\u003e is the premium alternative. For a full HPA pistol starter setup — tank, regulator, line, and adapter — call us on 01494 911990 and we can put together the right combination for your budget.\n\u003c\/div\u003e","brand":"Airtac","offers":[{"title":"Default Title","offer_id":55518845141368,"sku":"35946627","price":39.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0562\/8097\/3450\/files\/at-hc-m4.jpg?v=1775043689","url":"https:\/\/www.titanforgeairsoft.com\/products\/airtac-hpa-adapter-hi-capa-to-m4","provider":"Titan Forge Airsoft","version":"1.0","type":"link"}