{"id":245,"date":"2023-09-26T13:51:11","date_gmt":"2023-09-26T17:51:11","guid":{"rendered":"https:\/\/hydradefense.com\/?post_type=product&#038;p=245"},"modified":"2025-12-14T18:00:50","modified_gmt":"2025-12-14T22:00:50","slug":"microbest-phosphate-chrome-lined-bcg-5-56-223-300blk-c158-mp-bolt","status":"publish","type":"product","link":"https:\/\/hydradefense.com\/?product=microbest-phosphate-chrome-lined-bcg-5-56-223-300blk-c158-mp-bolt","title":{"rendered":"Microbest AR-15 Phosphate chrome lined BCG, 5.56\/223\/300BLK C158 MP bolt"},"content":{"rendered":"<p>Microbest OEMs for many of the leading AR manufacturers, like FN, BCM, and Sons of Liberty. Get the same quality straight from the source without paying more for a roll mark name! Microbest is the industry standard for manufacturing to exact specs and standards.<\/p>\n<p>Microbest BCGs meet or exceed Milspec standards, are M16 cut, chrome lined, come with upgraded Spingco 5 coil extractor springs. Bolts are Carpenter 158 steel and individually magnetic particle inspected, high pleasure tested and shot peened. Gas key is properly staked with grade 8 hardware.<\/p>\n<ul>\n<li>Mil spec M16 cut carrier, 8620 steel<\/li>\n<li>Bolt made from Carpenter 158 steel\n<ul>\n<li>Individually magnetic partial inspected<\/li>\n<li>Shot peened<\/li>\n<li>High pressure tested<\/li>\n<\/ul>\n<\/li>\n<li>Cam pin, 4340 steel<\/li>\n<li>Chromed firing pin, 8620 steel<\/li>\n<li>Springco 5 coil extractor spring<\/li>\n<li>Gas key, 4140 steel\n<ul>\n<li>Grade 8 hardware<\/li>\n<li>Properly steaked<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>*For your safety, it is recommended to check proper headspace when pairing a bolt and barrel<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Microbest OEMs for many of the leading AR manufacturers, like FN, BCM, and Sons of Liberty. Get the same quality straight from the source without paying more for a roll mark name! Microbest is the industry standard for manufacturing to exact specs and standards. Microbest BCGs meet or exceed Milspec&hellip; <\/p>\n","protected":false},"featured_media":246,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[34,31],"product_tag":[],"class_list":{"0":"post-245","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-ar-15","7":"product_cat-parts","8":"product_shipping_class-standard","10":"first","11":"instock","12":"taxable","13":"shipping-taxable","14":"purchasable","15":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/hydradefense.com\/index.php?rest_route=\/wp\/v2\/product\/245","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hydradefense.com\/index.php?rest_route=\/wp\/v2\/product"}],"about":[{"href":"https:\/\/hydradefense.com\/index.php?rest_route=\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/hydradefense.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=245"}],"version-history":[{"count":1,"href":"https:\/\/hydradefense.com\/index.php?rest_route=\/wp\/v2\/product\/245\/revisions"}],"predecessor-version":[{"id":990,"href":"https:\/\/hydradefense.com\/index.php?rest_route=\/wp\/v2\/product\/245\/revisions\/990"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hydradefense.com\/index.php?rest_route=\/wp\/v2\/media\/246"}],"wp:attachment":[{"href":"https:\/\/hydradefense.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=245"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/hydradefense.com\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_brand&post=245"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/hydradefense.com\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_cat&post=245"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/hydradefense.com\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_tag&post=245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}