{"product_id":"prefit-barrel-mini-fix-300-12","title":"Proof Research Prefit Barrel Mini Fix 300 12\" – Carbon Fiber Drop-In Replacement","description":"\u003cp\u003eThe Proof Research Prefit Barrel for the Mini Fix platform delivers match-grade accuracy in a compact 12-inch configuration chambered in 300 BLK. This barrel uses Proof's proprietary carbon fiber wrap over a precision-rifled stainless steel core, reducing weight while maintaining rigidity and heat dissipation for extended shooting sessions.\u003c\/p\u003e\u003cp\u003eDesigned as a drop-in replacement for the Q Mini Fix receiver, this prefit barrel requires no gunsmithing for installation. The carbon fiber construction offers significant weight savings over traditional steel barrels without sacrificing durability or precision. Threaded muzzle accepts standard 5\/8x24 TPI muzzle devices and suppressors.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Prefit barrel assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e Q Mini Fix platform\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 12 inches\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\u003eThread Pitch:\u003c\/strong\u003e 5\/8x24 TPI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse:\u003c\/strong\u003e Direct replacement barrel for Mini Fix, SBR builds, suppressed applications\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Proof Research","offers":[{"title":"Default Title","offer_id":48449641545983,"sku":"PR133729","price":1114.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/qminifixbarrel_37fed21f-caae-482a-adc6-9016d5c6a5da.png?v=1777264282","url":"https:\/\/doublestackstore.com\/products\/prefit-barrel-mini-fix-300-12","provider":"Double Stack Store","version":"1.0","type":"link"}