{"product_id":"polarstar-fire-control-unit-rev3","title":"PolarStar Fire Control Unit Rev. 3","description":"\u003cp\u003eThe PolarStar Fire Control Unit Rev. 3 (FCU) is the electronic brain of your Fusion Engine™, F2™, or JACK™ HPA system. The Rev. 3 features a built-in MCU (microcontroller unit) which combines the FCU and MCU into a single compact board, reducing wiring complexity and improving reliability.\u003c\/p\u003e\n\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eBuilt-in MCU — FCU and MCU combined on one board\u003c\/li\u003e\n\u003cli\u003eProgrammable fire modes, ROF, burst settings, and trigger response\u003c\/li\u003e\n\u003cli\u003eAvailable in Full Auto + Semi or Semi-Auto Only firmware\u003c\/li\u003e\n\u003cli\u003eCompatible with Fusion Engine™, F2™, and JACK™ systems\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PolarStar","offers":[{"title":"Full Auto + Semi","offer_id":45868782420002,"sku":"10000256","price":79.0,"currency_code":"USD","in_stock":true},{"title":"Semi-Auto Only","offer_id":45868782452770,"sku":"10000821","price":79.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/5355\/8050\/files\/ChatGPT_Image_Jun_19_2026_10_50_34_PM_2.png?v=1781934646","url":"https:\/\/www.katechairsoft.com\/products\/polarstar-fire-control-unit-rev3","provider":"KA Tech Airsoft ","version":"1.0","type":"link"}