{"product_id":"airtac-hpa-adapter-hi-capa-to-m4-straight","title":"AirTac HPA Adapter Hi-Capa to M4 (Straight)","description":"\u003cp\u003eThe AirTac HPA Adapter Hi-Capa to M4 (Straight) is a high-performance conversion solution that allows Hi-Capa gas blowback pistols to utilise standard M4 AEG magazines while running on a regulated HPA system. Designed for maximum consistency, increased ammunition capacity and reliable year-round performance, this adapter transforms your Hi-Capa into a highly competitive platform suited to both skirmish and speedsoft environments.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features (Quick View)\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDurable injection-moulded polymer construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStraight adapter configuration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePre-installed US-thread HPA fitting\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIntegrated BB-retention system\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatible with standard M4 AEG magazines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEliminates gas cooldown issues\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConsistent FPS and shot-to-shot performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReliable operation in cold weather\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRemovable magwell and shim set included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned for Hi-Capa GBB pistols\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eConstruction \u0026amp; Reliability\u003c\/h2\u003e\n\u003cp\u003eManufactured from durable injection-moulded polymer, the AirTac Hi-Capa Adapter is built to withstand regular skirmish use while maintaining precise alignment and fitment. The robust construction ensures long-term reliability without adding unnecessary weight to the platform.\u003c\/p\u003e\n\u003cp\u003eA pre-installed US-thread HPA fitting simplifies setup and allows direct integration with most standard HPA systems. The integrated BB-retention system helps prevent ammunition loss during magazine changes while maintaining dependable feeding under rapid-fire conditions.\u003c\/p\u003e\n\u003cp\u003eThe included removable magwell and shim set allow users to fine-tune fitment for optimal compatibility and feeding performance.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003ePerformance \u0026amp; Field Use\u003c\/h2\u003e\n\u003cp\u003eConverting a Hi-Capa pistol to HPA removes the common limitations associated with green gas and CO₂ systems. By delivering regulated air pressure directly to the replica, the adapter provides consistent FPS, stable accuracy and reliable performance regardless of firing tempo or ambient temperature.\u003c\/p\u003e\n\u003cp\u003eThe ability to use standard M4 AEG magazines dramatically increases ammunition capacity, reducing reload frequency and making the platform highly effective for competitive environments, extended skirmishes and high-intensity gameplay.\u003c\/p\u003e\n\u003cp\u003eUnlike traditional gas systems, HPA performance remains stable in cold weather conditions, allowing players to maintain consistent operation throughout the year.\u003c\/p\u003e\n\u003cp\u003eThe straight adapter design keeps the setup compact and streamlined while providing a natural magazine profile for players who prefer a traditional rifle magazine orientation.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eHi-Capa gas blowback pistols\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStandard M4 AEG magazines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHPA systems using US-thread fittings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRegulated HPA air supplies\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStandard HPA airlines and regulators\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eIdeal For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eHi-Capa HPA conversions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSpeedsoft players\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompetitive airsoft gameplay\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCQB environments\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePlayers seeking increased magazine capacity\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUsers wanting consistent year-round performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e AirTac\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e Hi-Capa to M4 Adapter (Straight)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Type:\u003c\/strong\u003e HPA Magazine Adapter\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e Injection-Moulded Polymer\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eColour:\u003c\/strong\u003e Black\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOther Relevant Specs:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eUS-Thread HPA Fitting\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIntegrated BB-Retention System\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStraight Magazine Configuration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRemovable Magwell Included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eShim Set Included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eM4 Magazine Compatible\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eRange Overview – AirTac HPA Adapters\u003c\/h2\u003e\n\u003cp\u003eAirTac HPA Adapters are engineered to convert traditional gas-powered airsoft platforms into highly efficient HPA systems. Designed around durability, reliability and ease of use, each adapter features precision moulded construction, integrated BB-retention technology and standardised HPA fittings for broad compatibility.\u003c\/p\u003e\n\u003cp\u003eSupporting a variety of pistol and SMG platforms, the AirTac adapter range provides increased ammunition capacity, improved consistency and dependable performance for players seeking a competitive edge.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eManufacturer\u003c\/h2\u003e\n\u003cp\u003eAirTac specialises in high-performance HPA conversion systems and accessories for airsoft players seeking efficient, reliable and adaptable equipment. With a focus on precision engineering and practical design, AirTac products are built to deliver dependable field performance and long-term durability.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eSafety Information\u003c\/h2\u003e\n\u003cp\u003eDo not exceed 150 PSI when operating any airsoft HPA adapter.\u003c\/p\u003e\n\u003cp\u003eAlways use a suitable secondary regulator and verify output pressure before connecting the adapter. Never connect directly to unregulated air sources, CO₂ systems or high-pressure tanks.\u003c\/p\u003e\n\u003cp\u003eEnsure all airlines, fittings and connectors are compatible and correctly installed before use. Regularly inspect all components for signs of wear or damage and replace any worn parts immediately.\u003c\/p\u003e","brand":"AirTac","offers":[{"title":"Default Title","offer_id":57815649747292,"sku":null,"price":41.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0977\/0021\/7180\/files\/at-hc-m4.jpg?v=1780865839","url":"https:\/\/www.firstandonlyretail.co.uk\/products\/airtac-hpa-adapter-hi-capa-to-m4-straight","provider":"First and Only Retail","version":"1.0","type":"link"}