{"product_id":"polarstar-jack-v2-m4-engine-hpa-standard-fcu-conversion-kit","title":"Polarstar JACK V2 M4 Engine - HPA Standard FCU Conversion Kit","description":"\u003cp\u003eThe \u003cstrong\u003ePolarstar JACK\u003c\/strong\u003e V2 M4 Engine - HPA Standard FCU Conversion Kit.  This is the full sized FCU version for easy programming.  Fits in most M4 and M16 airsoft guns for a full air line HPA engine conversion.  Contains everything you need internally.  Works drop-in with most M4 platforms.  G\u0026amp;G, Elite Force, JG, and most are pretty easy to install.  Watch some Youtube videos on how to put it in yourself.\u003c\/p\u003e\n\u003cp\u003eWith the Polarstar JACK engine, all you need to complete your HPA setup is:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHPA Air Tank (non-SLP tan regulator is okay, Ninja, Valken, FS is good)\u003c\/li\u003e\n\u003cli\u003eAir line regulator (non-SLP) - Wolverine, Valken, Ninja are all good\u003c\/li\u003e\n\u003cli\u003eAir line from the regulator to the gun\/engine\u003c\/li\u003e\n\u003cli\u003e7.4v 250mah battery to power the engine (plus LiPo charger)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThat's it!  Speedsoft gold!\u003c\/p\u003e","brand":"ASA","offers":[{"title":"Default Title","offer_id":17128942600282,"sku":"eaf44310-3fd3-4beb-a136-45787768f88e","price":320.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0063\/4526\/1146\/products\/DSC05482.jpg?v=1571718140","url":"https:\/\/airsoftgrounds.myshopify.com\/products\/polarstar-jack-v2-m4-engine-hpa-standard-fcu-conversion-kit","provider":"Airsoft Grounds","version":"1.0","type":"link"}