{"product_id":"lbe-unlimited-ready-build-kit-5-56-nato-13-7-chf-complete-upper","title":"LBE Unlimited Ready Build Kit 5.56 NATO 13.7\" CHF Complete Upper","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eLBE Unlimited Ready Build Kit\u003c\/span\u003e\u003c\/strong\u003e is a complete \u003cstrong\u003eAR-15 upper receiver assembly\u003c\/strong\u003e built around a \u003cstrong\u003e13.7\" cold hammer forged (CHF)\u003c\/strong\u003e barrel chambered in \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e5.56x45mm NATO\u003c\/span\u003e\u003c\/strong\u003e (also handles .223 Remington). Purpose-built for AR pistol and SBR builds, this upper combines compact handling with the durability of a hammer-forged bore for reliable cycling across duty, defense, and range use.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe kit pairs a complete upper receiver with a \u003cstrong\u003emid-length gas system\u003c\/strong\u003e, a \u003cstrong\u003efree-floating handguard\u003c\/strong\u003e, a full-mass \u003cstrong\u003eM16 bolt carrier group\u003c\/strong\u003e, and a classic \u003cstrong\u003eA2 flash hider\u003c\/strong\u003e. The 13.7\" CHF profile is well suited for pinned-and-welded muzzle device setups that reach the 16\" minimum overall length while preserving a short, quick-handling front end. Finished in \u003cstrong\u003eblack\u003c\/strong\u003e throughout, this upper drops onto any mil-spec AR-15 lower receiver.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003eComplete upper receiver\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003e13.7\" cold hammer forged barrel\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003eMid-length gas system\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003eFree-floating handguard\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003eM16 bolt carrier group\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003eA2 flash hider\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eDrop the Ready Build Kit onto any mil-spec AR-15 lower to complete the build - ideal for a compact AR pistol, an SBR project, or a general-purpose carbine upper.\u003c\/span\u003e\u003c\/p\u003e","brand":"LBE Unlimited","offers":[{"title":"Default Title","offer_id":55045961843010,"sku":"175878","price":524.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_3d015be2-37ee-44ca-b86b-9f7c53b57003.png?v=1784697569","url":"https:\/\/centerfiresystems.com\/products\/lbe-unlimited-ready-build-kit-5-56-nato-13-7-chf-complete-upper","provider":"Centerfire Systems","version":"1.0","type":"link"}