{"product_id":"polarstar-ugs-stock-system","title":"PolarStar UGS™ Stock System","description":"\u003cp\u003eWith the PolarStar UGS™ (Universal Gas Stock) you can now get the performance advantage of a HPA system without needing to be tethered to a remote air rig and still retain the likeness and function of a traditional adjustable AR-15 stock. Compatible with the F2™, JACK™, and Kythera™ cylinder conversion kits as well as other similar HPA cylinder systems on the market.\u003c\/p\u003e\n\n\u003cp\u003eIts integral regulator delivers performance on par with systems twice its size, with an output pressure range of 40–130psi easily adjusted with a 3\/32 allen key and lockable with a standard chrono zip tie. Install the optional High Pressure Spring (p\/n 10000692) to boost maximum output to ~200psi.\u003c\/p\u003e\n\n\u003ch4\u003eConfigurations\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHPA (2.000\"):\u003c\/strong\u003e Designed for 13ci HPA tanks and 2.000\" diameter buttstocks. Includes G\u0026amp;P R3 buttstock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCO2:\u003c\/strong\u003e Accepts 12g or 33g CO2 Inserts with a Milspec-compatible rail. CO2 insert included.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType 1:\u003c\/strong\u003e For M4 receivers accepting 1-3\/16\"-16 threaded buffer tubes (gearbox modification required).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType 2:\u003c\/strong\u003e For traditional TM Spec M4 receivers (receiver and gearbox modification required).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSimple zip-tie tournament lock\u003c\/li\u003e\n\u003cli\u003eAdjustable length of pull\u003c\/li\u003e\n\u003cli\u003eOnly 2 o-rings — promoting reliability and ease of maintenance\u003c\/li\u003e\n\u003cli\u003eCompatible with standard HPA and SLP tanks\u003c\/li\u003e\n\u003cli\u003eCross-compatible parts with Micro Reg GEN2 and CGS\u003c\/li\u003e\n\u003cli\u003eNot compatible with Fusion Engine™\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMin Output Pressure: 40 PSI\u003c\/li\u003e\n\u003cli\u003eMax Output Pressure: 130 PSI (~200 PSI with HP Spring, p\/n 10000692)\u003c\/li\u003e\n\u003cli\u003eMax Input Pressure: 900 PSI\u003c\/li\u003e\n\u003cli\u003eOutputs: Interfaces w\/ Airline (6mm OD x 4mm ID)\u003c\/li\u003e\n\u003cli\u003eWarranty: 1 Year Limited\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eHPA Tank, CO2 Cartridges \u0026amp; HP Spring not included.\u003c\/em\u003e\u003c\/p\u003e","brand":"PolarStar","offers":[{"title":"Type 1 HPA (RS Spec) w\/ R3 Buttstock","offer_id":45868776325154,"sku":"10000219","price":192.0,"currency_code":"USD","in_stock":true},{"title":"Type 2 HPA (TM Spec) w\/ R3 Buttstock","offer_id":45868776357922,"sku":"10000273","price":202.75,"currency_code":"USD","in_stock":true},{"title":"HK417 HPA w\/ R3 Buttstock","offer_id":45868776390690,"sku":"10000563","price":209.5,"currency_code":"USD","in_stock":true},{"title":"Type 1 12g CO2 Milspec (RS Spec)","offer_id":45868776423458,"sku":"10000608","price":269.75,"currency_code":"USD","in_stock":true},{"title":"Type 1 33g CO2 Milspec (RS Spec)","offer_id":45868776456226,"sku":"10000564","price":250.75,"currency_code":"USD","in_stock":true},{"title":"Type 2 12g CO2 Milspec (TM Spec)","offer_id":45868776488994,"sku":"10000609","price":277.5,"currency_code":"USD","in_stock":true},{"title":"Type 2 33g CO2 Milspec (TM Spec)","offer_id":45868776521762,"sku":"10000565","price":261.5,"currency_code":"USD","in_stock":true},{"title":"HK417 12g CO2 Milspec","offer_id":45868776554530,"sku":"10000610","price":275.5,"currency_code":"USD","in_stock":true},{"title":"HK417 33g CO2 Milspec","offer_id":45868776587298,"sku":"10000566","price":257.5,"currency_code":"USD","in_stock":true},{"title":"CO2 Insert 12g Milspec","offer_id":45868776620066,"sku":"10000540","price":118.5,"currency_code":"USD","in_stock":true},{"title":"CO2 Insert 33g Milspec","offer_id":45868776652834,"sku":"10000539","price":100.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/5355\/8050\/files\/ChatGPT_Image_Jun_19_2026_10_35_55_PM_1.png?v=1781933777","url":"https:\/\/www.katechairsoft.com\/products\/polarstar-ugs-stock-system","provider":"KA Tech Airsoft ","version":"1.0","type":"link"}