{"product_id":"polarstar-jack-hpa-engine-v3-ak","title":"PolarStar Jack HPA Engine (V3-AK)","description":"\u003cdiv\u003e\n\u003ch1\u003ePolarStar JACK HPA Engine (V3-AK)\u003c\/h1\u003e\n\u003cp\u003e\nThe PolarStar JACK HPA Engine (V3-AK), code-named \"Simple Jack,\" is an affordable, high-performance HPA conversion for popular AEG platforms. This drop-in cylinder replacement delivers programmable pneumatics for reliable, consistent power without the complexity of traditional gear-driven systems.\n\u003cbr\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/7466\/4301\/files\/JACK_Parts_1200x500.jpg?v=1553542544\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/7466\/4301\/files\/JACK_Mirror_1200x500_ffb6ba28-ed36-4fba-b04c-cb298e785406.jpg?v=1553543390\"\u003e\u003cimg alt=\"Gel Blaster JACK\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/7466\/4301\/files\/JACK_Gel.jpg?v=1631803323\"\u003e\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eCompatibility\u003c\/b\u003e: Drop-in cylinder that works with a wide range of gearbox versions that have center-line nozzles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAll-in-one kit\u003c\/b\u003e: Includes Filter Fitting installed, FCU, Switchboard, and Wire Harness to convert the specific rifle model.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSingle moving part design\u003c\/b\u003e: The nozzle acts as its own poppet valve, piloted by the solenoid for clean, reliable operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAir delivery\u003c\/b\u003e: Higher flow to the barrel than solenoid-only systems, with minimized dead volume for faster response and more efficient air use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVelocity capability\u003c\/b\u003e: Up to 500fps with a 0.20g BB at 130 psi; velocity scales with input pressure and barrel length (longer barrels typically yield higher max velocity).\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRate of fire\u003c\/b\u003e: Up to 30 rounds per second in standard configurations, depending on magazine quality and BBs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEfficiency\u003c\/b\u003e: 1000+ shots from a 13\/3000 tank at 1.5J with a 0.28g BB, thanks to optimized air path and reduced dead volume.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVersatility\u003c\/b\u003e: Gel Ball compatible JACK HPA configurations available for gel blasting setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWhat’s included\u003c\/b\u003e: FCU, Switchboard, Wire Harness, and all components necessary to convert your specific airsoft rifle; per-kit Filter Fitting pre-installed.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThe JACK HPA Engine delivers consistent, programmable performance with fewer moving parts than traditional gear-driven systems. It enables you to fine-tune velocity by adjusting input pressure, without swapping nozzles, and achieves reliable ROF across typical field conditions. Practical use cases range from standard field play to long-range engagements where predictable performance matters. Note: The HPA Tank, Air Rig (regulator and line), and Battery must be purchased separately for operation.\n\u003c\/p\u003e \u003cbr\u003e \u003ctable height=\"404\" width=\"549\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVelocity: 500fps w\/.20g @ 130psi\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThe JACK™ allows for easy velocity adjustment by changing input pressure and does not require different nozzles to reach its full velocity range. Using a standard M4 as an example, velocity can be adjusted from below 280fps and up to approximately 500fps with a.20g BB. Velocity can vary per model as longer barrels will increase the maximum velocity while shorter barrels will decrease it. \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eROF: 30rps\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThe maximum cyclic rate of the JACK™ is affected by several factors such as the operating pressure as well as quality of the magazine and BB's used. However, 30 rounds per second is achievable in most standard configurations.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAir Efficiency: 1000+ shots from 13\/3000 @ 1.5J w\/.28g\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlthough not a critical requirement during development, JACK™ does boast some highly respectable figures in this category. This is made possible by its intelligently laid out design which minimizes dead volume resulting in better air flow, faster response and less air used per shot.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e(Test Configuration: 6.05x375mm Barrel)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Socom Tactical Airsoft","offers":[{"title":"Default Title","offer_id":56972342591813,"sku":"10000745","price":329.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0948\/3767\/0213\/files\/polarstar-jack-hpa-engine-v3-ak-4924821.jpg?v=1769550910","url":"https:\/\/www.longshottactical.co.uk\/products\/polarstar-jack-hpa-engine-v3-ak","provider":"Longshot Tactical","version":"1.0","type":"link"}