{"title":"Rifle HPA Engines","description":"","products":[{"product_id":"polarstar-f2-hpa-engine","title":"PolarStar F2 Dual-Solenoid HPA Engine Conversion Kit","description":"\u003ch2\u003ePolarStar F2 HPA Engine Conversion Kit\u003c\/h2\u003e\n\u003cp\u003eUpgrade your airsoft rifle with the PolarStar F2 HPA Engine, a compact dual-solenoid system engineered for exceptional consistency, efficiency, and complete performance control.\u003c\/p\u003e\n\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eOften described as a cylinder-sized Fusion Engine, the PolarStar F2 independently controls nozzle movement and air release through its patented dual-solenoid design. This allows precise adjustment of loading time and air volume while supporting both true closed-bolt and traditional AEG-style firing sequences. Its lightweight one-piece poppet valve operates efficiently at lower pressures, while the spring-loaded nozzle delivers consistent loading force across the operating range.\u003c\/p\u003e\n\u003ch3\u003eFeatures \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDual-solenoid design for advanced performance tuning\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdjustable closed-bolt and AEG firing modes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e45–145 PSI operating-pressure range\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCQB-to-DMR velocity adjustment without changing nozzles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUp to approximately 30 rounds per second\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEfficient airflow for excellent shot capacity\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompact, lightweight cylinder-style construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBroad AEG gearbox compatibility\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003eThe F2 can produce approximately 280–480 FPS with 0.20g BBs in a standard M4 configuration, depending on pressure, barrel length, air seal, and setup. PolarStar rates the system for 1,000-plus shots from a 13\/3000 tank at 1.5 joules under its published test configuration.\u003c\/p\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eAvailable configurations support numerous platforms, including Version 2 M4\/M16, Version 3 AK, M249, ARES M4, ARES EFCS\/APS eSE, VFC HK417\/G28, KAC LMG, and M60 gearboxes. Select the correct model and nozzle configuration for your replica.\u003c\/p\u003e\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cp\u003eIncludes the configured F2 engine, installed filter fitting, FCU, switchboard, wiring harness, and model-specific conversion components. HPA tank, regulator, air line, and FCU battery are sold separately.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eProfessional installation and tuning are recommended to ensure correct alignment, air sealing, wiring, and safe operation.\u003c\/p\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e","brand":"PolarStar","offers":[{"title":"Default Title","offer_id":43599736373318,"sku":"10000258","price":439.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/2223\/6742\/files\/F2-1.jpg?v=1753350581"},{"product_id":"polarstar-jack-engine","title":"PolarStar JACK HPA Engine Conversion Kit","description":"\u003ch1\u003ePolarStar JACK HPA Engine Conversion Kit\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrade your AEG with the PolarStar JACK HPA Engine, an affordable electro-pneumatic conversion system engineered for fast trigger response, adjustable performance, reliable operation, and simplified maintenance.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe PolarStar JACK replaces your AEG’s mechanical gearbox components with a programmable HPA system. Its compact drop-in cylinder design uses only one moving component—the nozzle, which also functions as the poppet valve. This streamlined construction delivers strong airflow, rapid response, consistent shooting, and dependable operation with fewer wear-prone parts.\u003c\/p\u003e\n\u003cp\u003eVelocity is adjusted through input pressure and FCU settings, allowing the JACK to accommodate CQB, outdoor, and competitive airsoft requirements. In a standard M4 configuration, PolarStar reports adjustment from below 280 FPS to approximately 500 FPS with 0.20g BBs, depending on barrel length, bore, pressure, and tuning.\u003c\/p\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eProgrammable semi-auto, full-auto, and burst fire modes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInstant trigger response with adjustable rate of fire\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUp to approximately 30 rounds per second\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEfficient design capable of 1,000+ shots from a 13\/3000 tank\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEasy velocity adjustment without changing nozzles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDurable, low-maintenance single-moving-part design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFilter fitting helps protect the internal HPA system\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSystem:\u003c\/strong\u003e Electro-pneumatic HPA engine\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaximum Velocity:\u003c\/strong\u003e Approximately 500 FPS at 130 PSI with 0.20g BBs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaximum Rate of Fire:\u003c\/strong\u003e Approximately 30 RPS\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFire Control:\u003c\/strong\u003e Programmable FCU\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer:\u003c\/strong\u003e PolarStar Airsoft\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eAvailable for multiple center-line-nozzle gearbox platforms, including V2 M4\/M16, V3 AK, M249, ARES, VFC HK417\/G28, TAR-21, KAC LMG, and M60 configurations. Select the correct model for your replica.\u003c\/p\u003e\n\u003ch2\u003eWhat’s Included\u003c\/h2\u003e\n\u003cp\u003eJACK HPA engine, installed filter fitting, FCU, switchboard, wiring harness, and model-specific conversion components. HPA tank, regulator, air line, and FCU battery are sold separately.\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cp\u003eGearbox disassembly, engine alignment, FCU setup, and performance tuning are required. Professional installation is recommended for optimal reliability and air-seal performance.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"PolarStar","offers":[{"title":"Default Title","offer_id":43599736537158,"sku":"10000259","price":274.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/2223\/6742\/files\/Jack-Engine-1.jpg?v=1753350585"},{"product_id":"polarstar-fusion-engine-v2-gen-3-drop-in-kit","title":"PolarStar Fusion Engine V2 Gen 3 Drop-In HPA Conversion Kit for M4\/M16 AEGs","description":"\u003ch1\u003ePolarStar Fusion Engine V2 Gen 3 Drop-In HPA Kit\u003c\/h1\u003e\n\u003cp\u003eTransform your compatible M4 or M16 AEG into a highly adjustable HPA airsoft rifle with the PolarStar Fusion Engine V2 Gen 3. This complete electro-pneumatic system delivers immediate trigger response, consistent performance, and exceptional tuning capability.\u003c\/p\u003e\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe PolarStar Fusion Engine is a premium drop-in HPA conversion kit that replaces the complete Version 2 AEG gearbox. Its lightweight CNC-machined aluminum chassis houses a dual-solenoid, closed-bolt system that independently controls the nozzle and poppet valve. This allows players to fine-tune BB loading, air volume, velocity, and rate of fire for CQB, outdoor, or specialized builds.\u003c\/p\u003e\n\u003cp\u003eTrue closed-bolt operation promotes dependable accuracy, while the frame-mounted trigger microswitch provides a defined break, short reset, and responsive firing feel. Velocity can be adjusted through input pressure, with optional color-coded nozzles available for larger performance-range changes.\u003c\/p\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDual-solenoid electro-pneumatic HPA system\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCNC-machined aluminum gearbox chassis\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIndependently adjustable nozzle and poppet timing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdjustable velocity and 30+ RPS capability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFast trigger response with programmable FCU\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReliable performance across changing temperatures\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatible with standard AEG hop-ups, barrels, and magazines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEngine Type:\u003c\/strong\u003e Dual-solenoid, closed-bolt HPA\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eGearbox Configuration:\u003c\/strong\u003e Version 2 Gen 3\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRate of Fire:\u003c\/strong\u003e 30+ rounds per second\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaximum Performance:\u003c\/strong\u003e Up to 550 FPS with 0.20g BBs at 120 PSI, configuration dependent\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer:\u003c\/strong\u003e PolarStar Airsoft\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eConfigured for compatible Version 2 M4\/M16 AEG platforms. Fitment or additional components may be required for other Version 2 replicas.\u003c\/p\u003e\n\u003ch2\u003eWhat’s Included\u003c\/h2\u003e\n\u003cp\u003eFusion Engine assembly, installed filter fitting, FCU, switchboard, wire harness, and model-specific conversion components. HPA tank, regulator, air line, and FCU battery are sold separately.\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cp\u003eProfessional installation and proper system tuning are recommended for reliable alignment, feeding, and air efficiency.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"PolarStar","offers":[{"title":"Default Title","offer_id":43599736569926,"sku":"10000434","price":499.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/2223\/6742\/files\/Fusion-1.jpg?v=1753350586"},{"product_id":"wolverine-inferno-gen-2","title":"Wolverine Inferno Gen 2 for V2","description":"The INFERNO Gen 2 features a revolutionary single solenoid, independent poppet and nozzle design that sets a new standard for a drop in kit. This engine is efficient and built to perform to your likings and needs! You can easily control your fire control settings through your fire control unit (FCU)  to perfect the engine to your setup!\r\n\u003cul\u003e\r\n \t\u003cli\u003eDrop-in\u003c\/li\u003e\r\n \t\u003cli\u003eEfficient\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n ","brand":"Wolverine","offers":[{"title":"Default Title","offer_id":43599744598086,"sku":"NFR-CA-012-M4-SPN-SKU","price":349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/2223\/6742\/files\/Inferno-v2-m4.png?v=1753350686"},{"product_id":"polarstar-kythera-engine-v2","title":"PolarStar Kythera SA V2 Mechanical HPA Engine for M4\/M16 Airsoft Rifles","description":"\u003ch2\u003ePolarStar Kythera SA V2 HPA Engine for M4\/M16\u003c\/h2\u003e\n\u003cp\u003eTransform your compatible M4 or M16 AEG into a dependable, battery-free HPA platform with the PolarStar Kythera SA V2 Engine. Its fully mechanical, waterproof design delivers efficient semi-automatic performance without an FCU, wiring harness, or electronic components.\u003c\/p\u003e\n\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe PolarStar Kythera V2 is a high-performance mechanical HPA engine engineered for Version 2 M4\/M16 AEG gearboxes. Its closed-bolt operation completes the entire firing cycle with each trigger pull, providing consistent nozzle movement, reliable feeding, and quick follow-up shots.\u003c\/p\u003e\n\u003cp\u003eA balanced spool valve and hardened alloy-steel sears create a crisp, realistic single-action trigger break and reset. Trigger weight, pull length, and overtravel are adjustable, while tunable nozzle dwell and return speed help optimize performance for different barrel and hop-up configurations.\u003c\/p\u003e\n\u003ch3\u003eFeatures \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eFully mechanical, battery-free HPA operation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWaterproof design with no FCU or electronics\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRealistic adjustable trigger pull and reset\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eClosed-bolt system for consistent shot placement\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEfficient valve design for excellent air economy\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdjustable nozzle dwell and return speed\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWide 60–180 PSI operating-pressure range\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSemi-automatic operation ideal for CQB and DMR builds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEngine Type:\u003c\/strong\u003e Mechanical HPA\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFire Mode:\u003c\/strong\u003e Semi-automatic only\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eGearbox Type:\u003c\/strong\u003e Version 2\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eNozzle:\u003c\/strong\u003e PolarStar #1 nozzle\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOperating Pressure:\u003c\/strong\u003e 60–180 PSI\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer:\u003c\/strong\u003e PolarStar Airsoft\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eDesigned for compatible M4 and M16 airsoft rifles using a standard Version 2 AEG gearbox. Fitment may vary between manufacturers and receiver designs.\u003c\/p\u003e\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cp\u003eIncludes the configured Kythera SA V2 engine, correct trigger linkage, filter fitting, and model-specific conversion components. HPA tank, regulator, and air line are sold separately.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003ch2\u003eThe Kythera installs as a single gearbox assembly and typically requires no gearbox modification. Proper alignment, trigger adjustment, and air-system setup are essential; professional installation is recommended for users without HPA technical experience.\u003c\/h2\u003e","brand":"PolarStar","offers":[{"title":"Default Title","offer_id":43599761080390,"sku":"10000774","price":287.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/2223\/6742\/files\/Polarstar-Kythera-Semi-Auto-V2-M4_M16.webp?v=1753350874"},{"product_id":"gate-pulsar-d-hpa-engine-with-titan-ii-bluetooth-expert-rear-wired","title":"Gate Pulsar D HPA Engine with TITAN II Bluetooth Expert [Rear Wired]","description":"\u003ch3\u003ePULSAR D Dual Solenoid HPA Engine\u003c\/h3\u003e\r\n\u003cstrong\u003eFeatures:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003e\n\u003cstrong\u003eMuzzle Velocities:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eRanges from 250 to 650 FPS\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n 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calibration\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli\u003e\n\u003cstrong\u003eAdvanced GCS App:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eUser-friendly interface for accessing settings and configurations\u003c\/li\u003e\r\n \t\u003cli\u003eOptions include:\r\n\u003cul\u003e\r\n \t\u003cli\u003eBinary trigger\u003c\/li\u003e\r\n \t\u003cli\u003eTrigger sensitivity\u003c\/li\u003e\r\n \t\u003cli\u003eROF adjustments\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli\u003eLive adjustments via Bluetooth®\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli\u003e\n\u003cstrong\u003eRemote Trigger Capability:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eUse a smartwatch for remote triggering\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003e\n\u003cstrong\u003eCompact Design:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eWorld's smallest and most advanced dual solenoid valve HPA engine\u003c\/li\u003e\r\n \t\u003cli\u003eFits in replicas where size constraints were previously an issue\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eChoose from five included nozzles or use a regular AEG nozzle\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\nTake your HPA replica into the future!","brand":"GATE","offers":[{"title":"Default Title","offer_id":43599812886598,"sku":null,"price":479.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/2223\/6742\/files\/Gate-Pulsar-D-HPA-Engine-with-TITAN-II-Bluetooth-Expert-Rear-Wired-1-pdf.jpg?v=1753351464"},{"product_id":"gate-pulsar-h-hybrid-hpa-engine-etu-not-included","title":"Gate PULSAR H Hybrid HPA Engine 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performance\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli\u003e\n\u003cstrong\u003eQuantum Trigger 2:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eAdjustable sensitivity options:\r\n\u003cul\u003e\r\n \t\u003cli\u003eFrom ludicrous touch\u003c\/li\u003e\r\n \t\u003cli\u003eTo hair-trigger response\u003c\/li\u003e\r\n \t\u003cli\u003eFull movement sensitivity\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli\u003e\n\u003cstrong\u003eBluetooth® 5.2:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eOnboard technology for advanced connectivity and performance\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\nElevate your shooting experience with the PULSAR H engine!","brand":"GATE","offers":[{"title":"Default Title","offer_id":43599812919366,"sku":null,"price":279.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/2223\/6742\/files\/Gate-PULSAR-H-Hybrid-HPA-Engine-ETU-not-included-2-pdf.jpg?v=1753351466"},{"product_id":"gate-pulsar-d-hpa-engine-etu-not-included","title":"Gate PULSAR D HPA Engine [ETU not included]","description":"\u003ch3\u003ePULSAR D Dual Solenoid HPA Engine\u003c\/h3\u003e\r\n\u003cstrong\u003eKey Features:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003e\n\u003cstrong\u003eMuzzle Velocities:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eRanges from 250 to 650 FPS\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli\u003e\n\u003cstrong\u003eRate of Fire (ROF):\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eAdjustable from 1 to 40 RPS\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli\u003e\n\u003cstrong\u003eVersatile Applications:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eIdeal for CQB, assault, and sniper replicas\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli\u003e\n\u003cstrong\u003eInnovative Mechanism:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eClosed-bolt design\u003c\/li\u003e\r\n \t\u003cli\u003eAdvanced BB feed system ensures a straight and repeatable trajectory in full AUTO\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eAdvanced BB feed system ensures a straight and repeatable trajectory in full AUTO\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cstrong\u003eEngine Calibration:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003e\n\u003cstrong\u003eSimplified Calibration:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eInnovative cycle synchronization automation for effortless tuning\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli\u003e\n\u003cstrong\u003eUser-Friendly GCS App:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eAccess a multitude of settings and configurations, including:\r\n\u003cul\u003e\r\n \t\u003cli\u003eBinary trigger\u003c\/li\u003e\r\n \t\u003cli\u003eTrigger sensitivity\u003c\/li\u003e\r\n \t\u003cli\u003eROF adjustments\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli\u003eLive adjustments via Bluetooth®\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli\u003e\n\u003cstrong\u003eRemote Trigger Functionality:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eControl your engine using a smartwatch\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003e\n\u003cstrong\u003eCompact Size:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eWorld's smallest and most advanced dual solenoid valve HPA engine\u003c\/li\u003e\r\n \t\u003cli\u003eFits in replicas previously limited by size constraints\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli\u003e\n\u003cstrong\u003eCustomization Options:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eChoose from five included nozzles or use a standard AEG nozzle\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\nTake your HPA replica into the future!","brand":"GATE","offers":[{"title":"Default Title","offer_id":43599812952134,"sku":null,"price":298.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/2223\/6742\/files\/Gate-PULSAR-D-HPA-Engine-ETU-not-included-1-pdf.jpg?v=1753351468"},{"product_id":"mechlabs-x-mod-mechanical-hpa-unit","title":"MechLabs X-MOD V2 HPA Engine for M4","description":"\u003ch2\u003eMechLabs X-MOD Mechanical HPA 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Its CNC-machined aluminum construction delivers strength without unnecessary weight, while the precision lock-fit design maintains consistent alignment during installation and maintenance.\u003c\/p\u003e\n\u003cp\u003eA three-axis XYZ adjustment system allows technicians to fine-tune engine position and nozzle alignment within different receivers. The adjustable X-MOD bolt and Air Bender system control nozzle fit, air-cycle timing, rate of fire, and overall air consumption. This helps maintain stable output during rapid firing while reducing shot-down and extending usable tank life.\u003c\/p\u003e\n\u003cp\u003eBecause the X-MOD operates entirely mechanically, it requires no battery, FCU, wiring harness, or electronics. 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Other Version 2 platform nozzles are sold separately. The X-MOD bolt technology is also cross-compatible with MechLabs NEXXUS and ARC platforms.\u003c\/p\u003e\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cp\u003eX-MOD HPA engine gearbox, three adjustment tools, O-ring set, three selector plates, quick fitting, hose, and MechLabs sticker.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eProfessional installation and chronograph tuning are recommended. An external HPA tank and compatible regulator are required and sold separately. 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Its responsive pneumatic operation provides rapid trigger response, consistent cycling, and tunable performance for competitive play, speedsoft, and recreational skirmishing.\u003c\/p\u003e\n\u003cp\u003ePaired with the included Catalyst Gen 2 Fire Control Unit, the Phoenix supports safe, semi-automatic, full-automatic, binary, two-round burst, and three-round burst modes. The system can achieve rates of fire exceeding 40 RPS when properly configured, while adjustable regulator pressure and FCU settings allow users to tune performance for their replica and field limits.\u003c\/p\u003e\n\u003ch3\u003eFeatures \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eResponsive electronic HPA operation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCapable of 40+ rounds per second\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMultiple programmable fire modes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEfficient airflow for improved shot capacity\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQuick-disconnect inner grip line\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eComplete M4\/V2 conversion package\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eEngine length with nozzle: approximately 90mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMaximum input pressure: 130 PSI\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNozzle: Backdraft #01\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInner grip line: approximately 235mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eManufacturer: Backdraft Innovations\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eDesigned for most M4-style AEGs using Version 2 gearboxes. 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