{"product_id":"prefit-barrel-mini-fix-300-16","title":"Proof Research Prefit Barrel Mini Fix 300 BLK 16\" – Carbon Fiber Match Grade","description":"\u003cp\u003eThe Proof Research Prefit Barrel for the Mini Fix is a drop-in replacement barrel chambered in 300 BLK with a 16-inch length. Built with Proof's carbon fiber-wrapped construction, this barrel combines match-grade accuracy with significant weight savings compared to traditional steel barrels. The prefit design allows installation without gunsmithing on compatible Mini Fix receivers.\u003c\/p\u003e\u003cp\u003eThis barrel features a steel core wrapped in aerospace-grade carbon fiber, delivering consistent accuracy while reducing barrel harmonics and heat buildup. Threaded muzzle accommodates suppressors and muzzle devices. Compatible with Mini Fix platforms chambered in 300 BLK. Barrel only — does not include gas block, muzzle device, or installation hardware.\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 300 BLK\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Carbon fiber-wrapped match-grade steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Platform:\u003c\/strong\u003e Mini Fix receivers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e Standard 5\/8x24 (verify compatibility)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Barrel only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse:\u003c\/strong\u003e Precision rifle builds, suppressed setups, weight reduction upgrades\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Proof Research","offers":[{"title":"Default Title","offer_id":48449640464639,"sku":"PR133736","price":1114.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/qminifixbarrel_af35be1a-a239-4761-8639-fc7b0fe28220.png?v=1777264276","url":"https:\/\/doublestackstore.com\/products\/prefit-barrel-mini-fix-300-16","provider":"Double Stack Store","version":"1.0","type":"link"}