{"product_id":"mpi-nickel-boron-ar-15-bcg-m16-cut-223-5-56","title":"MPI Nickel Boron AR-15 BCG — M16 Cut | .223\/5.56","description":"\u003c!-- ═══════════════════════════════════════════════════════════\n     SEO — Shopify \u003e Products \u003e SEO section\n═══════════════════════════════════════════════════════════ --\u003e\n\n\u003c!-- PAGE TITLE:\nMPI Nickel Boron AR-15 BCG — M16 Cut | Carpenter 158 Bolt | USA Made | ARTakedownTool.com\n--\u003e\n\n\u003c!-- META DESCRIPTION:\nMPI Nickel Boron AR-15 Bolt Carrier Group — M16 cut, Carpenter 158 steel bolt, 9310 steel carrier, magnetic particle inspected. $159.99. 100% USA made. In stock at ARTakedownTool.com.\n--\u003e\n\n\u003c!-- URL HANDLE: mpi-nickel-boron-ar15-bcg-m16-cut --\u003e\n\n\n\u003c!-- ═══════════════════════════════════════════════════════════\n     SCHEMA — Paste into Shopify theme.liquid before \u003c\/head\u003e\n     OR Online Store \u003e Preferences \u003e Additional Scripts\n═══════════════════════════════════════════════════════════ --\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"MPI Nickel Boron AR-15 Bolt Carrier Group — M16 Cut\",\n  \"description\": \"Nickel boron coated AR-15 Bolt Carrier Group with M16 cut. Features a Carpenter 158 steel bolt, 9310 steel carrier, 4140 steel extractor and ejector with nitride coating, magnetic particle inspection, and MIL-SPEC components throughout. 100% USA made.\",\n  \"image\": [\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/2282\/1621\/files\/Nickel-AR15-BCG-M16-cut.png?v=1779121120\"\n  ],\n  \"url\": \"https:\/\/www.artakedowntool.com\/products\/mpi-nickel-boron-ar15-bcg-m16-cut\",\n  \"sku\": \"MPI-NiB-BCG-M16-556\",\n  \"brand\": { \"@type\": \"Brand\", \"name\": \"MPI\" },\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"priceCurrency\": \"USD\",\n    \"price\": \"159.99\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"url\": \"https:\/\/www.artakedowntool.com\/products\/mpi-nickel-boron-ar15-bcg-m16-cut\",\n    \"seller\": { \"@type\": \"Organization\", \"name\": \"The Takedown Tools\" }\n  }\n}\n\u003c\/script\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this BCG compatible with the Partisan Disruptor FRT?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The MPI Nickel Boron BCG has an M16 cut, which is required for reliable operation with the Partisan Disruptor FRT. The M16 profile carrier tail provides the geometry the Disruptor's reset lobe needs to function correctly.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What calibers does this BCG support?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This BCG is chambered for .223 Remington and 5.56 NATO and is compatible with all mil-spec AR-15 platforms in those calibers.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the advantage of nickel boron over standard phosphate finish?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Nickel boron provides a harder, slicker surface than phosphate. It reduces friction between the bolt and carrier, runs cleaner with less fouling buildup, and is significantly easier to clean. It also offers excellent corrosion resistance.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is Carpenter 158 steel and why does it matter for the bolt?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Carpenter 158 is the MIL-SPEC steel specification for AR-15 bolts. It provides the correct balance of hardness, toughness, and fatigue resistance under the high-stress cycling of semi-automatic fire. It is the same standard used by military contractors.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What does magnetic particle inspected (MPI) mean?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Magnetic particle inspection is a non-destructive testing process that detects surface and near-surface cracks in ferromagnetic materials. Every MPI-tested bolt is individually inspected to confirm there are no stress fractures or defects before it ships. It is the industry gold standard for bolt quality verification.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\n\u003c!-- ═══════════════════════════════════════════════════════════\n     PRODUCT DESCRIPTION — Paste into Shopify product description\n     using the \u003c \u003e HTML editor toggle\n═══════════════════════════════════════════════════════════ --\u003e\n\u003cstyle\u003e\n  .nbcg { font-family: inherit; color: #111; line-height: 1.65; }\n  .nbcg h2 { font-size: 18px; font-weight: 700; margin: 28px 0 10px; padding-top: 28px; border-top: 1px solid #e8e8e8; letter-spacing: .3px; }\n  .nbcg h2:first-child { margin-top: 0; padding-top: 0; border-top: none; }\n  .nbcg h3 { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 1.5px; color: #cd7f2e; margin: 20px 0 8px; }\n  .nbcg p { font-size: 14px; color: #444; margin-bottom: 12px; line-height: 1.65; }\n  .nbcg ul { padding-left: 0; list-style: none; margin: 0 0 14px; }\n  .nbcg ul li { font-size: 14px; color: #444; padding: 7px 0 7px 20px; border-bottom: 1px solid #f0f0f0; position: relative; }\n  .nbcg ul li::before { content: '▸'; color: #cd7f2e; position: absolute; left: 0; }\n  .nbcg .spec-table { width: 100%; border-collapse: collapse; margin: 0 0 16px; font-size: 14px; }\n  .nbcg .spec-table th { background: #f8f8f8; font-weight: 600; text-align: left; padding: 8px 12px; border: 1px solid #e8e8e8; color: #111; width: 40%; font-size: 13px; }\n  .nbcg .spec-table td { padding: 8px 12px; border: 1px solid #e8e8e8; color: #444; }\n  .nbcg .spec-table tr:nth-child(even) td { background: #fafafa; }\n  .nbcg .note { background: #fff8f0; border-left: 3px solid #cd7f2e; padding: 10px 14px; margin: 14px 0; font-size: 13px; color: #7a5520; border-radius: 0 3px 3px 0; line-height: 1.6; }\n  .nbcg .frt-callout { background: #f0faef; border-left: 3px solid #1a7a1a; padding: 10px 14px; margin: 14px 0; font-size: 13px; color: #1a5a1a; border-radius: 0 3px 3px 0; line-height: 1.6; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"nbcg\"\u003e\n\n  \u003ch3\u003eOverview\u003c\/h3\u003e\n  \u003cp\u003eA fully MIL-SPEC Nickel Boron coated AR-15 Bolt Carrier Group built to run hard, clean easy, and last. M16 cut carrier, Carpenter 158 steel bolt, magnetic particle inspected — everything correct, nothing cut short. 100% USA made.\u003c\/p\u003e\n\n  \u003cdiv class=\"frt-callout\"\u003e\n    \u003cstrong\u003eFRT Compatible:\u003c\/strong\u003e M16 cut carrier is required for reliable function with the \u003ca href=\"https:\/\/www.artakedowntool.com\/products\/patented-forced-reset-drop-in-cassette-trigger-ar-15-platform-usa-made\" style=\"color:#1a7a1a;\"\u003ePartisan Disruptor FRT\u003c\/a\u003e. This BCG meets that requirement. If you're building an FRT platform, \u003ca href=\"https:\/\/www.artakedowntool.com\/products\/partisan-disruptor-hfrt-bundle\" style=\"color:#1a7a1a;\"\u003esee our Disruptor + HFRT Buffer Bundle\u003c\/a\u003e — or add this BCG to complete the setup.\n  \u003c\/div\u003e\n\n  \u003ch2\u003eSpecifications\u003c\/h2\u003e\n  \u003ctable class=\"spec-table\"\u003e\n    \u003ctr\u003e\n\u003cth\u003eCaliber\u003c\/th\u003e\n\u003ctd\u003e.223 Remington \/ 5.56 NATO\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eNickel Boron\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCarrier Cut\u003c\/th\u003e\n\u003ctd\u003eM16 Cut\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCarrier Material\u003c\/th\u003e\n\u003ctd\u003e9310 Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBolt Material\u003c\/th\u003e\n\u003ctd\u003eCarpenter 158 Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eExtractor \u0026amp; Ejector\u003c\/th\u003e\n\u003ctd\u003e4140 Steel — Nitride Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCam Pin\u003c\/th\u003e\n\u003ctd\u003e4140 Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFiring Pin\u003c\/th\u003e\n\u003ctd\u003e8740 Steel — Hard Chrome Finish\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eGas Rings\u003c\/th\u003e\n\u003ctd\u003eMIL-SPEC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eO-Ring\u003c\/th\u003e\n\u003ctd\u003eMIL-SPEC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eInspection\u003c\/th\u003e\n\u003ctd\u003eMagnetic Particle Inspected (MPI)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003e100% USA Made\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003ctd\u003e$159.99\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\n  \u003ch2\u003eFeatures\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNickel boron finish — harder, slicker, and easier to clean than phosphate or standard nitride\u003c\/li\u003e\n    \u003cli\u003eM16 cut carrier — required for FRT builds; compatible with all standard AR-15 platforms\u003c\/li\u003e\n    \u003cli\u003eCarpenter 158 steel bolt — MIL-SPEC standard, same spec used by military contractors\u003c\/li\u003e\n    \u003cli\u003e9310 steel carrier — high-strength alloy with excellent fatigue resistance\u003c\/li\u003e\n    \u003cli\u003e4140 steel extractor \u0026amp; ejector with nitride coating — added hardness and corrosion resistance\u003c\/li\u003e\n    \u003cli\u003e4140 steel cam pin — matched hardness to carrier for long service life\u003c\/li\u003e\n    \u003cli\u003e8740 steel firing pin with hard chrome finish — corrosion resistant, dimensionally stable\u003c\/li\u003e\n    \u003cli\u003eMIL-SPEC O-ring and gas rings — correct sealing and gas management from day one\u003c\/li\u003e\n    \u003cli\u003eMagnetic particle inspected — every bolt individually tested for surface and subsurface defects\u003c\/li\u003e\n    \u003cli\u003e100% USA made\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eWhy Nickel Boron?\u003c\/h2\u003e\n  \u003cp\u003eNickel boron is harder and has a lower coefficient of friction than phosphate. That means less heat buildup, less fouling adhesion, and a BCG that wipes clean in seconds rather than minutes. It runs reliably with or without lubrication — important for high-rate-of-fire applications like FRT builds where the BCG cycles under greater stress and frequency than standard semi-auto use.\u003c\/p\u003e\n  \u003cp\u003eCombined with an M16 profile carrier and fully MIL-SPEC internals, this BCG is one of the most capable drop-in upgrades available for any mil-spec AR-15 platform.\u003c\/p\u003e\n\n  \u003ch2\u003eFRT Compatibility\u003c\/h2\u003e\n  \u003cdiv class=\"note\"\u003eThe Partisan Disruptor FRT requires an M16-profile BCG for reliable reset function. The M16 carrier tail provides the extended geometry that engages the Disruptor's reset lobe during the cycling stroke. A standard semi-auto carrier will not provide consistent reset. This BCG meets that requirement and is a direct recommended pairing for any Disruptor build.\u003c\/div\u003e\n\n  \u003ch2\u003eRelated Products \u0026amp; Resources\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/products\/patented-forced-reset-drop-in-cassette-trigger-ar-15-platform-usa-made\" style=\"color:#cd7f2e;\"\u003ePartisan Disruptor FRT — AR-15 Forced Reset Trigger ($300)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/products\/odin-works-hfrt-buffer-system\" style=\"color:#cd7f2e;\"\u003eOdin Works HFRT Buffer System — Purpose-Built for FRTs ($80)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/products\/partisan-disruptor-hfrt-bundle\" style=\"color:#cd7f2e;\"\u003ePartisan Disruptor FRT + Odin Works HFRT Bundle — Save $30 ($350)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/collections\/hoffman-super-safety-s-atrius-selector-ak-frt-22-lr-frt-arc-frt\" style=\"color:#cd7f2e;\"\u003eHoffman Tactical Super Safety\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/collections\/as-designs-arc-trigger\" style=\"color:#cd7f2e;\"\u003eAS Designs ARC-Fire V2\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eFRT Resources\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/pages\/best-frt-triggers-for-ar-15\" style=\"color:#cd7f2e;\"\u003eBest FRT Triggers for AR-15 — 2026 Buyer's Guide\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/blogs\/blogs\/forced-reset-trigger-ar15-install-guide-2026\" style=\"color:#cd7f2e;\"\u003eFRT Install Guide — Step by Step\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/pages\/are-frt-triggers-legal\" style=\"color:#cd7f2e;\"\u003eAre FRT Triggers Legal?\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/pages\/frt-vs-super-safety-differences\" style=\"color:#cd7f2e;\"\u003eFRT vs Super Safety — What's the Difference?\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/pages\/partisan-disruptor-troubleshooting\" style=\"color:#cd7f2e;\"\u003ePartisan Disruptor Troubleshooting Guide\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/blogs\/blogs\" style=\"color:#cd7f2e;\"\u003eFRT Blog — Tips, Guides \u0026amp; News\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n\u003c\/div\u003e\n","brand":"The Takedown Tools","offers":[{"title":"Default Title","offer_id":54264937644337,"sku":"sku-48159939133685","price":159.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0918\/4680\/3761\/files\/Nickel-AR15-BCG-M16-cut_7a27f4b6-edd3-4432-bbe2-f1e2fdf984bf.png?v=1779369460","url":"https:\/\/selfrescuetactical.com\/products\/mpi-nickel-boron-ar-15-bcg-m16-cut-223-5-56","provider":"Self Rescue Tactical ","version":"1.0","type":"link"}