{"id":20810,"date":"2026-04-14T15:32:47","date_gmt":"2026-04-14T19:32:47","guid":{"rendered":"https:\/\/saddlerockarmory.com\/?post_type=product&#038;p=20810"},"modified":"2026-04-21T15:05:13","modified_gmt":"2026-04-21T19:05:13","slug":"sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black","status":"publish","type":"product","link":"https:\/\/saddlerockarmory.com\/index.php\/product\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\/","title":{"rendered":"Sons of Liberty Gun Works BCG 6mm ARC\/6.5 Grendel (Black)"},"content":{"rendered":"<h3>Sons of Liberty Gun Works BCG 6mm ARC\/6.5 Grendel (Black)<\/h3>\n<p>This Sons of Liberty Gun Works Bolt Carrier Group is designed to provide reliability and dependability in your 6mm ARC and 6.5 Grendel rifles.<\/p>\n<h3>Bolt:<\/h3>\n<ul>\n<li>Precision machined from Carpenter Technology No. 158 alloy<\/li>\n<li>Heat treated per mil-spec,<\/li>\n<li>Shot peened per ASTM B851\/SAE AMS2430S,<\/li>\n<li>Vibratory tumbled<\/li>\n<li>Individual high pressure\/proof (HP)<\/li>\n<li>Individual magnetic particle inspection ASTM E1444\/E1444M (MP)<\/li>\n<li>Markings deep laser engraved (SP=Shot Peened, HP=High Pressure Tested, MP=Magnetic Particle Inspection.)<\/li>\n<\/ul>\n<h3>Extractor:<\/h3>\n<ul>\n<li>Precision machined from 4340 tool steel alloy per SAE AMS6415T\/AMS6484D (vs 4140),<\/li>\n<li>Heat treated<\/li>\n<li>Shot peen per ASTM B851\/SAE AMS2430S.<\/li>\n<\/ul>\n<h3>Extractor Retaining Pin:<\/h3>\n<ul>\n<li>Precision machined and ground S7 Tool Steel<\/li>\n<li>Heat treated per ASTM A681-08<\/li>\n<li>Shot peened per mil-spec print<\/li>\n<li>Manganese phosphate<\/li>\n<\/ul>\n<h3>Extractor Spring:<\/h3>\n<ul>\n<li>Tactical Springs\/Sprinco 5 coil, ASTM Grade A401 Chrome Silicon wire stock<\/li>\n<li>Heat treated<\/li>\n<li>Stress relieved, Molybdenum-Disulfide infused<\/li>\n<li>Cryogenic processed (all post winding)<\/li>\n<li>Mil-spec black insert\/synthetic elastomer extractor buffer (nitrile-butadiene, shore hardness 80+\/-5 durometer per MIL-PRF-6855)<\/li>\n<\/ul>\n<h3>Ejector:<\/h3>\n<ul>\n<li>S7 Tool Steel<\/li>\n<li>Heat treated per ASTM A681-08<\/li>\n<li>Shot peened per Mil-Spec<\/li>\n<li>Manganese phosphate<\/li>\n<\/ul>\n<h3>Ejector Spring:<\/h3>\n<ul>\n<li>Heat treated<\/li>\n<li>Mil Spec<\/li>\n<\/ul>\n<h3>Gas Rings:<\/h3>\n<ul>\n<li>Standard stainless steel per Mil-Spec X3<\/li>\n<\/ul>\n<h3>Carrier:<\/h3>\n<ul>\n<li>Machined from AISI 8620 aircraft qualty alloy per ASTM A108\/A322-13<\/li>\n<li>Full auto profile<\/li>\n<li>Heat treated<\/li>\n<li>Carburized\/strain relieved, hard chrome bore<\/li>\n<li>Precision ground gas key interface<\/li>\n<li>Sons of Liberty Battle Flag logo deep laser engraved<\/li>\n<li>Manganese phosphate<\/li>\n<\/ul>\n<h3>Gas Key:<\/h3>\n<ul>\n<li>Machined from 4130 chromoly steel alloy per ASTM A108\/A322-13<\/li>\n<li>Heat treated, hard chrome internal<\/li>\n<li>Manganese phosphate<\/li>\n<li>Permatex sealed<\/li>\n<li>Grade 8 hex screws torqued and staked all per mil-spec<\/li>\n<\/ul>\n<h3>Cam Pin:<\/h3>\n<ul>\n<li>Precision machined 4340 chromoly steel alloy per SAE AMS6415T\/AMS6484D<\/li>\n<li>Heat treated\/processed per mil-spec<\/li>\n<li>Manganese phosphate<\/li>\n<li>Solid film lubricant applied and cured per mil-spec<\/li>\n<\/ul>\n<h3>Firing Pin:<\/h3>\n<ul>\n<li>Precision machined 8640 steel alloy<\/li>\n<li>Heat treated\/processed per mil-spec<\/li>\n<li>Hard chrome plate<\/li>\n<\/ul>\n<h3>Firing Pin Retaining Pin:<\/h3>\n<ul>\n<li>Precision machined from 1038 carbon steel<\/li>\n<li>Heat treated\/processed per mil-spec<\/li>\n<li>Manganese phosphate<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Sons of Liberty Gun Works BCG 6mm ARC\/6.5 Grendel (Black) This Sons of Liberty Gun Works Bolt Carrier Group is designed to provide reliability and dependability in your 6mm ARC and 6.5 Grendel rifles. Bolt: Precision machined from Carpenter Technology No. 158 alloy Heat treated per mil-spec, Shot peened per ASTM B851\/SAE AMS2430S, Vibratory tumbled&#8230;<\/p>\n","protected":false},"featured_media":20811,"template":"","meta":{"_acf_changed":false,"_themeisle_gutenberg_block_has_review":false},"product_brand":[],"product_cat":[1703],"product_tag":[1675],"class_list":["post-20810","product","type-product","status-publish","has-post-thumbnail","product_cat-ar-parts","product_tag-sons-of-liberty-gun-works","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Sons of Liberty Gun Works BCG 6mm ARC\/6.5 Grendel (Black) - Saddle Rock Armory | Central Texas&#039; Premier Firearms Shop<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/saddlerockarmory.com\/index.php\/product\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sons of Liberty Gun Works BCG 6mm ARC\/6.5 Grendel (Black) - Saddle Rock Armory | Central Texas&#039; Premier Firearms Shop\" \/>\n<meta property=\"og:description\" content=\"Sons of Liberty Gun Works BCG 6mm ARC\/6.5 Grendel (Black) This Sons of Liberty Gun Works Bolt Carrier Group is designed to provide reliability and dependability in your 6mm ARC and 6.5 Grendel rifles. Bolt: Precision machined from Carpenter Technology No. 158 alloy Heat treated per mil-spec, Shot peened per ASTM B851\/SAE AMS2430S, Vibratory tumbled...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/saddlerockarmory.com\/index.php\/product\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\/\" \/>\n<meta property=\"og:site_name\" content=\"Saddle Rock Armory | Central Texas&#039; Premier Firearms Shop\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/people\/Saddle-Rock-Armory\/61577728022640\/?mibextid=wwXIfr&amp;rdid=0U3sQix8lfJudpZS&amp;share_url=httpswww.facebook.comshare195aw7Mj2VmibextidwwXIfr\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-21T19:05:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/saddlerockarmory.com\/wp-content\/uploads\/2026\/04\/image-full-241102-3f83b7535e2ab11abc10eb669bc21e3c.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"900\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/saddlerockarmory.com\\\/index.php\\\/product\\\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\\\/\",\"url\":\"https:\\\/\\\/saddlerockarmory.com\\\/index.php\\\/product\\\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\\\/\",\"name\":\"Sons of Liberty Gun Works BCG 6mm ARC\\\/6.5 Grendel (Black) - Saddle Rock Armory | Central Texas&#039; Premier Firearms Shop\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/saddlerockarmory.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/saddlerockarmory.com\\\/index.php\\\/product\\\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/saddlerockarmory.com\\\/index.php\\\/product\\\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/saddlerockarmory.com\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/image-full-241102-3f83b7535e2ab11abc10eb669bc21e3c.jpg\",\"datePublished\":\"2026-04-14T19:32:47+00:00\",\"dateModified\":\"2026-04-21T19:05:13+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/saddlerockarmory.com\\\/index.php\\\/product\\\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/saddlerockarmory.com\\\/index.php\\\/product\\\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/saddlerockarmory.com\\\/index.php\\\/product\\\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\\\/#primaryimage\",\"url\":\"https:\\\/\\\/saddlerockarmory.com\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/image-full-241102-3f83b7535e2ab11abc10eb669bc21e3c.jpg\",\"contentUrl\":\"https:\\\/\\\/saddlerockarmory.com\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/image-full-241102-3f83b7535e2ab11abc10eb669bc21e3c.jpg\",\"width\":900,\"height\":900},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/saddlerockarmory.com\\\/index.php\\\/product\\\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/saddlerockarmory.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Shop Page\",\"item\":\"https:\\\/\\\/saddlerockarmory.com\\\/index.php\\\/tienda\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Sons of Liberty Gun Works BCG 6mm ARC\\\/6.5 Grendel (Black)\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/saddlerockarmory.com\\\/#website\",\"url\":\"https:\\\/\\\/saddlerockarmory.com\\\/\",\"name\":\"Saddle Rock Armory | Central Texas' Premier Firearms Shop\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/saddlerockarmory.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/saddlerockarmory.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/saddlerockarmory.com\\\/#organization\",\"name\":\"Saddle Rock Armory\",\"url\":\"https:\\\/\\\/saddlerockarmory.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/saddlerockarmory.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/saddlerockarmory.com\\\/wp-content\\\/uploads\\\/2016\\\/12\\\/logo-SRA.png\",\"contentUrl\":\"https:\\\/\\\/saddlerockarmory.com\\\/wp-content\\\/uploads\\\/2016\\\/12\\\/logo-SRA.png\",\"width\":1366,\"height\":376,\"caption\":\"Saddle Rock Armory\"},\"image\":{\"@id\":\"https:\\\/\\\/saddlerockarmory.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/people\\\/Saddle-Rock-Armory\\\/61577728022640\\\/?mibextid=wwXIfr&rdid=0U3sQix8lfJudpZS&share_url=httpswww.facebook.comshare195aw7Mj2VmibextidwwXIfr\",\"https:\\\/\\\/www.instagram.com\\\/saddlerockarmory?igsh=MWxlbnh6ajl6MHF2Zw&utm_source=qr\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Sons of Liberty Gun Works BCG 6mm ARC\/6.5 Grendel (Black) - Saddle Rock Armory | Central Texas&#039; Premier Firearms Shop","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/saddlerockarmory.com\/index.php\/product\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\/","og_locale":"en_US","og_type":"article","og_title":"Sons of Liberty Gun Works BCG 6mm ARC\/6.5 Grendel (Black) - Saddle Rock Armory | Central Texas&#039; Premier Firearms Shop","og_description":"Sons of Liberty Gun Works BCG 6mm ARC\/6.5 Grendel (Black) This Sons of Liberty Gun Works Bolt Carrier Group is designed to provide reliability and dependability in your 6mm ARC and 6.5 Grendel rifles. Bolt: Precision machined from Carpenter Technology No. 158 alloy Heat treated per mil-spec, Shot peened per ASTM B851\/SAE AMS2430S, Vibratory tumbled...","og_url":"https:\/\/saddlerockarmory.com\/index.php\/product\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\/","og_site_name":"Saddle Rock Armory | Central Texas&#039; Premier Firearms Shop","article_publisher":"https:\/\/www.facebook.com\/people\/Saddle-Rock-Armory\/61577728022640\/?mibextid=wwXIfr&rdid=0U3sQix8lfJudpZS&share_url=httpswww.facebook.comshare195aw7Mj2VmibextidwwXIfr","article_modified_time":"2026-04-21T19:05:13+00:00","og_image":[{"width":900,"height":900,"url":"https:\/\/saddlerockarmory.com\/wp-content\/uploads\/2026\/04\/image-full-241102-3f83b7535e2ab11abc10eb669bc21e3c.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/saddlerockarmory.com\/index.php\/product\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\/","url":"https:\/\/saddlerockarmory.com\/index.php\/product\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\/","name":"Sons of Liberty Gun Works BCG 6mm ARC\/6.5 Grendel (Black) - Saddle Rock Armory | Central Texas&#039; Premier Firearms Shop","isPartOf":{"@id":"https:\/\/saddlerockarmory.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/saddlerockarmory.com\/index.php\/product\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\/#primaryimage"},"image":{"@id":"https:\/\/saddlerockarmory.com\/index.php\/product\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\/#primaryimage"},"thumbnailUrl":"https:\/\/saddlerockarmory.com\/wp-content\/uploads\/2026\/04\/image-full-241102-3f83b7535e2ab11abc10eb669bc21e3c.jpg","datePublished":"2026-04-14T19:32:47+00:00","dateModified":"2026-04-21T19:05:13+00:00","breadcrumb":{"@id":"https:\/\/saddlerockarmory.com\/index.php\/product\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/saddlerockarmory.com\/index.php\/product\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/saddlerockarmory.com\/index.php\/product\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\/#primaryimage","url":"https:\/\/saddlerockarmory.com\/wp-content\/uploads\/2026\/04\/image-full-241102-3f83b7535e2ab11abc10eb669bc21e3c.jpg","contentUrl":"https:\/\/saddlerockarmory.com\/wp-content\/uploads\/2026\/04\/image-full-241102-3f83b7535e2ab11abc10eb669bc21e3c.jpg","width":900,"height":900},{"@type":"BreadcrumbList","@id":"https:\/\/saddlerockarmory.com\/index.php\/product\/sons-of-liberty-gun-works-bcg-6mm-arc-6-5-grendel-black\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/saddlerockarmory.com\/"},{"@type":"ListItem","position":2,"name":"Shop Page","item":"https:\/\/saddlerockarmory.com\/index.php\/tienda\/"},{"@type":"ListItem","position":3,"name":"Sons of Liberty Gun Works BCG 6mm ARC\/6.5 Grendel (Black)"}]},{"@type":"WebSite","@id":"https:\/\/saddlerockarmory.com\/#website","url":"https:\/\/saddlerockarmory.com\/","name":"Saddle Rock Armory | Central Texas' Premier Firearms Shop","description":"","publisher":{"@id":"https:\/\/saddlerockarmory.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/saddlerockarmory.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/saddlerockarmory.com\/#organization","name":"Saddle Rock Armory","url":"https:\/\/saddlerockarmory.com\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/saddlerockarmory.com\/#\/schema\/logo\/image\/","url":"https:\/\/saddlerockarmory.com\/wp-content\/uploads\/2016\/12\/logo-SRA.png","contentUrl":"https:\/\/saddlerockarmory.com\/wp-content\/uploads\/2016\/12\/logo-SRA.png","width":1366,"height":376,"caption":"Saddle Rock Armory"},"image":{"@id":"https:\/\/saddlerockarmory.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/people\/Saddle-Rock-Armory\/61577728022640\/?mibextid=wwXIfr&rdid=0U3sQix8lfJudpZS&share_url=httpswww.facebook.comshare195aw7Mj2VmibextidwwXIfr","https:\/\/www.instagram.com\/saddlerockarmory?igsh=MWxlbnh6ajl6MHF2Zw&utm_source=qr"]}]}},"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/saddlerockarmory.com\/index.php\/wp-json\/wp\/v2\/product\/20810","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/saddlerockarmory.com\/index.php\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/saddlerockarmory.com\/index.php\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/saddlerockarmory.com\/index.php\/wp-json\/wp\/v2\/media\/20811"}],"wp:attachment":[{"href":"https:\/\/saddlerockarmory.com\/index.php\/wp-json\/wp\/v2\/media?parent=20810"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/saddlerockarmory.com\/index.php\/wp-json\/wp\/v2\/product_brand?post=20810"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/saddlerockarmory.com\/index.php\/wp-json\/wp\/v2\/product_cat?post=20810"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/saddlerockarmory.com\/index.php\/wp-json\/wp\/v2\/product_tag?post=20810"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}