{"product_id":"polarstarjack-conversion-kit-v3-ak","title":"PolarStarJACK Conversion Kit-V3 AK","description":"\u003ch2\u003ePolarStarJACK Conversion Kit\u003c\/h2\u003e\n\u003ch3\u003eUltra-Compact Drop-In Performance. Blistering ROF. Proven PolarStar Reliability.\u003c\/h3\u003e\n\u003cp\u003eUpgrade your primary rifle with the legendary speed, air efficiency, and rock-solid reliability of the PolarStar JACK HPA Engine. Designed as an accessible, high-performance electro-pneumatic drop-in conversion, the JACK replaces your AEG gearbox's internal cylinder assembly to deliver instant trigger response and pinpoint FPS consistency.\u003c\/p\u003e\n\u003cp\u003eUtilizing a single-solenoid, centre-line design, the JACK minimizes moving parts to maximize durability and air efficiency. Whether you are running tight CQB arenas or stretching out long-range shots in woodland skirmishes, the JACK provides effortless velocity adjustment and fire-rate customization through the included PolarStar Micro FCU.\u003c\/p\u003e\n\u003ch3\u003eVariant Options Available\u003c\/h3\u003e\n\u003ch4\u003eV2 Platform (M4\/M16\/AR-15\/MP5):\u003c\/h4\u003e\n\u003cp\u003eIncludes the V2 nozzle, switch board, and wire harness designed for seamless drop-in installation into standard Version 2 AEG gearboxes.\u003c\/p\u003e\n\u003ch4\u003eV3 Platform (AK-47\/AK-74\/G36\/AUG):\u003c\/h4\u003e\n\u003cp\u003eIncludes the V3 nozzle, offset trigger switch board, and specialized V3 wire harness for Version 3 AEG gearboxes.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-Compact Centre-Line Design:\u003c\/strong\u003eDirect cylinder replacement housing fits into almost any standard AEG gearbox shell with minimal fitting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Speed Single-Solenoid Performance:\u003c\/strong\u003eEngineered with only one moving part (the nozzle), maximizing air efficiency and reducing potential failure points.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull FCU Programmability:\u003c\/strong\u003eThe included PolarStar Micro FCU allows instant adjustment of Rate of Fire (1–30+ RPS), Nozzle Dwell, and Burst firing modes on the fly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool-Less Velocity Tuning:\u003c\/strong\u003eAdjust your muzzle velocity (FPS) instantly by altering your HPA regulator pressure, no spring swaps or teardowns needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen-Bolt Operating System:\u003c\/strong\u003eDelivers lightning-fast initial trigger response for instant shot placement during high-speed engagements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad Pressure Range:\u003c\/strong\u003eOperates smoothly across 40 to 130 PSI to easily adapt to strict field energy limits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\"\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Engine\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eJACK HPA Cylinder Engine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable Variants\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVersion 2 (M4\/M16)\/Version 3 (AK Series)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e40 – 130 PSI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVelocity\/FPS Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200 – 500 FPS (Adjustable via PSI \u0026amp; Nozzles)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRate of Fire (ROF)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 to 30+ RPS (Programmable via FCU)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Source\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHPA Rig (Tank + Regulator) \u0026amp; 7.4v LiPo FCU Battery (JST)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSystem Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSingle Solenoid, Electro-Pneumatic Centre-Line Drop-In\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eBZ Tech Team Advice:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNozzle Dwell Tuning (dN):\u003c\/strong\u003eLower your FCU Nozzle Dwell (dN) value until the engine begins to skip BBs or misfeed, then bump it back up 2–3 points. This ensures you aren't wasting tank air on every shot!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlignment Matters:\u003c\/strong\u003eCentre-line alignment between the JACK nozzle and your hop-up bucking is key. Ensure your gearbox shell sits square inside your receiver to prevent air leaks or mid-cap feeding jams.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery Maintenance:\u003c\/strong\u003eAlways unplug your 7.4v JST FCU battery when packing away your kit, the Micro FCU draws a tiny standby current that can drain LiPo batteries completely over time.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PolarStar","offers":[{"title":"Default Title","offer_id":57005755695490,"sku":"10000745","price":319.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/8224\/7217\/files\/PolarStarJACKConversionKit-V3AK.webp?v=1793284541","url":"https:\/\/killerinstinctairsoft.co.uk\/products\/polarstarjack-conversion-kit-v3-ak","provider":"Killer Instinct Tactical","version":"1.0","type":"link"}