{"product_id":"luth-ar-bcg-complete-lr-308","title":"Luth-AR Complete BCG – LR-308\/AR-10 Pattern Rifles","description":"\u003cp\u003eThis Luth-AR complete bolt carrier group is engineered for reliable cycling in LR-308 and AR-10 pattern rifles chambered in .308 Winchester\/7.62x51mm NATO. Manufactured to mil-spec dimensions, this BCG provides a direct replacement for worn or damaged factory bolt assemblies, restoring proper function and feeding reliability. Shooters building a large-frame AR or replacing a failing BCG will appreciate the quality machining and proper staking on this assembly.\u003c\/p\u003e\u003cp\u003eThe carrier is constructed from 8620 steel with a phosphate finish for corrosion resistance and reduced friction. The bolt is machined from 9310 steel and properly heat-treated to withstand the higher chamber pressures of .308 cartridges. Gas key is secured with grade 8 fasteners and staked per military specifications. This is a drop-in component for standard LR-308\/AR-10 pattern upper receivers—no gunsmithing required, though basic familiarity with AR disassembly is recommended.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Complete Bolt Carrier Group\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e LR-308, AR-10 pattern rifles (.308 Win\/7.62 NATO)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarrier Material:\u003c\/strong\u003e 8620 steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Material:\u003c\/strong\u003e 9310 steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Phosphate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas Key:\u003c\/strong\u003e Properly staked, mil-spec\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Drop-in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Complete bolt carrier group (carrier, bolt, cam pin, firing pin, retaining pin)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Luth-AR","offers":[{"title":"Default Title","offer_id":47938417197311,"sku":"LUTH308-BCA","price":200.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/1289961.jpg?v=1766513735","url":"https:\/\/doublestackstore.com\/products\/luth-ar-bcg-complete-lr-308","provider":"Double Stack Store","version":"1.0","type":"link"}