{"product_id":"lantac-usa-m-spec-5-56-223-nib-bolt-carrier-group","title":"LANTAC USA M-SPEC 5.56\/.223 NIB Bolt Carrier Group","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eLANTAC USA M-SPEC NiB Bolt Carrier Group\u003c\/span\u003e\u003c\/strong\u003e is a precision-engineered \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e5.56\/.223\u003c\/span\u003e\u003c\/strong\u003e BCG built to mil-spec dimensions and tolerances for AR-15 platform rifles and pistols. Designed and produced by \u003cstrong\u003eLANTAC USA\u003c\/strong\u003e, the M-SPEC BCG delivers the reliability and consistency demanded by serious shooters and features a \u003cstrong\u003efull-auto style carrier\u003c\/strong\u003e for long-term durability under hard use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe carrier is manufactured from \u003cstrong\u003e8620 steel\u003c\/strong\u003e, the industry-standard material for mil-spec bolt carriers, and is machined to exact mil-spec dimensions for drop-in compatibility with standard AR-15 upper receivers. The M-SPEC is finished in a \u003cstrong\u003eNickel Boron (NiB)\u003c\/strong\u003e coating that produces an ultra-smooth, low-friction surface for easier cleaning, reduced fouling buildup, and improved lubricity over traditional phosphate finishes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eChambered for \u003cstrong\u003e5.56mm NATO \/ .223 Remington\u003c\/strong\u003e, this LANTAC M-SPEC NiB BCG is an ideal upgrade or replacement component for any mil-spec AR-15 build, whether a duty carbine, defensive rifle, or pistol-platform upper. LANTAC USA's commitment to quality control and tight tolerances makes the M-SPEC a go-to choice for builders who want dependable function right out of the box.\u003c\/span\u003e\u003c\/p\u003e","brand":"LANTAC USA","offers":[{"title":"Default Title","offer_id":55075304800578,"sku":"194107","price":172.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_64ff67b9-a203-40a8-a9ec-a53ceeb5fca4.png?v=1784754201","url":"https:\/\/centerfiresystems.com\/products\/lantac-usa-m-spec-5-56-223-nib-bolt-carrier-group","provider":"Centerfire Systems","version":"1.0","type":"link"}