{"product_id":"cmmg-mk4-ar15-upper-receiver-assembly-coyote-tan","title":"CMMG Mk4\/AR15 Upper Receiver Assembly - Coyote Tan","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eCMMG Mk4\/AR15 Upper Receiver Assembly\u003c\/span\u003e\u003c\/strong\u003e is built around a \u003cstrong\u003eforged 7075-T6 aluminum\u003c\/strong\u003e housing and finished in a durable \u003cstrong\u003eCoyote Tan Cerakote\u003c\/strong\u003e that matches CMMG's modern rifle and pistol-caliber lineup.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe Mk4 platform's key feature is its \u003cstrong\u003eenlarged ejection port\u003c\/strong\u003e, engineered to reliably clear spent cases when running pistol-caliber AR-15 builds chambered in \u003cstrong\u003e9mm, 10mm, .40 S\u0026amp;W, and .45 ACP\u003c\/strong\u003e in addition to standard 5.56mm and .223 Remington uppers. \u003cstrong\u003eM4 feed ramps\u003c\/strong\u003e are machined into the receiver for reliable feeding from a standard AR-15 magazine well.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThis Assembly configuration ships ready to drop onto your lower receiver, with CMMG's \u003cstrong\u003eZEROED polymer dust cover\u003c\/strong\u003e pre-installed. This variant \u003cstrong\u003eomits the forward assist\u003c\/strong\u003e for a clean, lighter profile. The upper is sold as a receiver housing and components only - no barrel, bolt carrier group, charging handle, handguard, or muzzle device is included - making it a solid starting point for a custom AR-15 rifle or pistol-caliber build.\u003c\/span\u003e\u003c\/p\u003e","brand":"CMMG","offers":[{"title":"Default Title","offer_id":55292118335810,"sku":"55BA290CT","price":125.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/alt_67fe3c57-0da7-4984-bbf3-ad9ef90095e6.jpg?v=1785102596","url":"https:\/\/centerfiresystems.com\/products\/cmmg-mk4-ar15-upper-receiver-assembly-coyote-tan","provider":"Centerfire Systems","version":"1.0","type":"link"}