{"product_id":"prefit-barrel-q-fix-308win-20","title":"Proof Research Prefit Barrel Q Fix 308 Win 20\" – Drop-In Carbon Fiber Barrel","description":"\u003cp\u003eThe Proof Research Prefit Barrel for Q Fix chambered in 308 Winchester delivers match-grade accuracy in a lightweight carbon fiber package engineered for precise drop-in installation. This 20-inch barrel features Proof's proprietary carbon fiber wrap over a match-grade stainless steel core, combining lightweight handling with excellent heat dissipation and shot-to-shot consistency for precision rifle applications.\u003c\/p\u003e\u003cp\u003eDesigned specifically for the Q Fix rifle platform, this prefit barrel requires no gunsmithing for installation—thread it on, headspace it with the included gauges, and torque to spec. The carbon fiber construction significantly reduces weight compared to traditional steel barrels while maintaining rigidity and thermal stability. Finished with a durable matte coating. Threaded muzzle accepts standard 5\/8-24 muzzle devices.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Prefit rifle barrel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChambering:\u003c\/strong\u003e 308 Winchester\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 20 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Carbon fiber wrapped stainless steel core\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Q Fix rifle platform only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMuzzle Thread:\u003c\/strong\u003e 5\/8-24 TPI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Matte black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse:\u003c\/strong\u003e Precision shooting, hunting, tactical applications\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Proof Research","offers":[{"title":"Default Title","offer_id":48449719632127,"sku":"PR114520","price":1114.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/qfixbarrel_ab41ee56-a79c-4629-a06c-47181ccc0d5e.png?v=1777264614","url":"https:\/\/doublestackstore.com\/products\/prefit-barrel-q-fix-308win-20","provider":"Double Stack Store","version":"1.0","type":"link"}