{"product_id":"prefit-barrel-mini-fix-223-16","title":"Proof Research Prefit Barrel for Mini Fix – .223 Wylde, 16\", Carbon Fiber","description":"\u003cp\u003eThe Proof Research Prefit Barrel for Mini Fix delivers match-grade accuracy in a lightweight carbon fiber barrel designed for direct installation on Mini Fix bolt-action rifles. The 16-inch barrel is chambered in .223 Wylde, allowing shooters to run both .223 Remington and 5.56 NATO ammunition with optimal accuracy. Proof's carbon fiber wrap over a match-grade stainless steel core reduces weight by up to 64% compared to traditional steel barrels while maintaining heat dissipation and rigidity under sustained fire.\u003c\/p\u003e\u003cp\u003eThis prefit barrel requires no gunsmithing for installation on compatible Mini Fix receivers. The barrel features a 1:8 twist rate optimized for bullets ranging from 55 to 77 grains. Proof Research uses aerospace-grade carbon fiber and proprietary stress-relief processes to ensure consistent barrel harmonics and zero shift. Thread pattern and muzzle specifications match Mini Fix platform standards.\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 .223 Wylde\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwist Rate:\u003c\/strong\u003e 1:8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Carbon fiber-wrapped stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Platform:\u003c\/strong\u003e Mini Fix bolt-action rifles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Drop-in prefit, no gunsmithing required\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Proof Research","offers":[{"title":"Default Title","offer_id":48449648820479,"sku":"PR133422","price":1114.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/qminifixbarrel_19dad4b2-1949-4679-abad-710c1853931f.png?v=1777264314","url":"https:\/\/doublestackstore.com\/products\/prefit-barrel-mini-fix-223-16","provider":"Double Stack Store","version":"1.0","type":"link"}