{"product_id":"proof-research-ar-style-barrel-6mm-arc-18-1-7-5-twist-stainless-steel-rifle-length-threaded","title":"Proof Research AR-Style Barrel 6mm ARC 18\" 1:7.5 Twist Stainless Steel Rifle Length - Threaded","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eProof Research AR-Style 6mm ARC 18\" Stainless Steel Barrel\u003c\/span\u003e\u003c\/strong\u003e is a precision drop-in replacement barrel built for AR-platform rifles chambered in the versatile \u003cstrong\u003e6mm ARC\u003c\/strong\u003e cartridge. Part of Proof Research's \u003cstrong\u003eTraditional Steel\u003c\/strong\u003e series, this barrel is engineered for long service life and is designed to handle the extreme pressures the 6mm ARC is capable of producing, making it a strong foundation for a custom AR-15 build.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eAt \u003cstrong\u003e18\"\u003c\/strong\u003e in length, this barrel pairs a \u003cstrong\u003e1:7.5\"\u003c\/strong\u003e twist rate with a \u003cstrong\u003erifle-length\u003c\/strong\u003e gas system and a \u003cstrong\u003e.750\"\u003c\/strong\u003e gas journal diameter for reliable cycling with a wide range of 6mm ARC bullet weights. The muzzle is \u003cstrong\u003ethreaded\u003c\/strong\u003e for a muzzle device or suppressor, and the barrel is finished in Proof Research's corrosion-resistant \u003cstrong\u003estainless steel\u003c\/strong\u003e finish. It is supplied as a bare barrel with \u003cstrong\u003eno sights\u003c\/strong\u003e installed, ready to be headspaced and installed on a compatible AR-platform upper receiver.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eWhether you are building a precision 6mm ARC AR-15 for hunting, competition, or defensive use, this Proof Research Traditional Steel barrel delivers the accuracy and durability that the brand is known for.\u003c\/span\u003e\u003c\/p\u003e","brand":"Proof Research","offers":[{"title":"Default Title","offer_id":55169759510850,"sku":"126660","price":630.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_bdb691bb-98cb-4ece-8560-c1112fc175a3.png?v=1784905858","url":"https:\/\/centerfiresystems.com\/products\/proof-research-ar-style-barrel-6mm-arc-18-1-7-5-twist-stainless-steel-rifle-length-threaded","provider":"Centerfire Systems","version":"1.0","type":"link"}