{"product_id":"cmmg-55ca9d7-mk4-receiver-extension-buffer-tube-ar-platform-black-steel","title":"CMMG 55CA9D7 MK4 Receiver Extension Buffer Tube AR Platform Black Steel","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eCMMG MK4 Receiver Extension\u003c\/span\u003e\u003c\/strong\u003e is a \u003cstrong\u003esteel\u003c\/strong\u003e \u003cstrong\u003ebuffer tube\u003c\/strong\u003e built as a direct replacement for the \u003cstrong\u003eAR platform\u003c\/strong\u003e. Designed for the \u003cstrong\u003eMK4\u003c\/strong\u003e lower receiver family, this \u003cstrong\u003ereceiver extension\u003c\/strong\u003e provides the carbine-length housing that retains your rifle's buffer and recoil spring on the rear of the lower.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eConstructed from \u003cstrong\u003esteel\u003c\/strong\u003e with a \u003cstrong\u003eblack\u003c\/strong\u003e finish, this CMMG buffer tube installs in place of a standard carbine-pattern receiver extension on any compatible \u003cstrong\u003eAR-15\u003c\/strong\u003e-pattern rifle. The matte black surface matches factory CMMG components for a clean, uniform appearance on a complete build or repair.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eWhether you are replacing a worn-out tube or finishing a custom build, the CMMG MK4 Receiver Extension is built to deliver reliable performance as part of your AR-platform rifle.\u003c\/span\u003e\u003c\/p\u003e","brand":"CMMG","offers":[{"title":"Default Title","offer_id":54992332915010,"sku":"48556","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_f37a21fe-6edb-47f1-86f3-2b398bc350c3.png?v=1784241699","url":"https:\/\/centerfiresystems.com\/products\/cmmg-55ca9d7-mk4-receiver-extension-buffer-tube-ar-platform-black-steel","provider":"Centerfire Systems","version":"1.0","type":"link"}