{"product_id":"rcm-hk21-308-barrel-17-7-inches","title":"RCM HK21 .308 Barrel 17.7 Inches","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003cspan style=\"font-size: 12pt;\"\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 18.6667px; background-color: #ffff00;\"\u003e\u003ca style=\"background-color: #ffff00;\" href=\"%%GLOBAL_ShopPathSSL%%\/hk21-barrel-grip-assembly\"\u003eHK21 Barrel Grip Assembly\u003c\/a\u003e now included with this barrel!\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe RCM HK Style 21 Barrel is a premium 17.700-inch barrel designed for \u003cstrong\u003e7.62 NATO\u003c\/strong\u003e, precision-crafted from Mil-Spec 41V50 steel. It features cold hammer forging, a 1:10 twist rate, nitrided surfaces, and 12 flutes for improved heat dissipation.\u003c\/span\u003e\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003ePerfect for completing HK21\/FMP or HK11 builds, these barrels are stripped, requiring users to add their own hardware.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 14pt;\"\u003eNeed more HK21 Parts? Feed Mechanism, Barrel Shroud, Complete Bolt Assembly, Trigger Pack \u003ca title=\"HK21 Parts\" href=\"%%GLOBAL_ShopPathSSL%%\/parts-and-accessories\/shop-by-model\/hk21\/\" target=\"_blank\" rel=\"noopener\"\u003eCLICK HERE!\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"RIM Country Mfg","offers":[{"title":"Default Title","offer_id":52668997239106,"sku":"BBL0168","price":674.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/IMG_9823a__44906.1766506189.1280.1280.jpg?v=1774274700","url":"https:\/\/centerfiresystems.com\/products\/rcm-hk21-308-barrel-17-7-inches","provider":"Centerfire Systems","version":"1.0","type":"link"}