{"product_id":"polarstar-ugs-end-plate","title":"PolarStar UGS™ End Plate Assembly R01","description":"\u003cp\u003eThis End Plate fits the \"Original\" UGS™ for M4-series rifles and includes the pivot screw for mounting PolarStar UGS™ Stock Rails. Use this part to convert G\u0026amp;P R3 series rifles to run UGS™ 2.000\" HPA and Milspec stock rails — stick-on rails are no longer needed.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCross compatible with Type 1 or Type 2 UGS™\u003c\/li\u003e\n\u003cli\u003eConverts G\u0026amp;P R3 to use PolarStar Stock Rails\u003c\/li\u003e\n\u003cli\u003eIncludes pivot screw\u003c\/li\u003e\n\u003cli\u003eNot compatible with HK417 UGS™\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PolarStar","offers":[{"title":"Default Title","offer_id":45868781764642,"sku":"10000647","price":34.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/5355\/8050\/files\/ChatGPT_Image_Jun_30_2026_01_18_55_PM_3.png?v=1782850746","url":"https:\/\/www.katechairsoft.com\/products\/polarstar-ugs-end-plate","provider":"KA Tech Airsoft ","version":"1.0","type":"link"}