{"product_id":"cmmg-9mm-ejection-port-cover-kit","title":"CMMG 9MM Ejection Port Cover Kit – AR-15 9mm Conversions","description":"\u003cp\u003eThe CMMG 9MM Ejection Port Cover Kit is a purpose-built replacement for AR-15 platform firearms chambered in 9mm. Standard AR ejection port covers are sized for .223\/5.56 cases; this kit features a modified cover opening optimized for 9mm case geometry, reducing the chance of case rim interference during ejection and improving reliability in pistol-caliber carbine builds.\u003c\/p\u003e\u003cp\u003eConstructed from mil-spec materials with a durable black finish. Installation is straightforward for anyone familiar with AR-15 assembly—requires only a roll pin punch and basic tools. The kit includes the modified door, C-clip, spring, and roll pin for a complete replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Ejection Port Cover Assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e AR-15 chambered in 9mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Mil-spec steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Drop-in with basic tools\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Modified ejection port door, C-clip, spring, roll pin\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CMMG","offers":[{"title":"Default Title","offer_id":47943493812479,"sku":"CMMG22BA627","price":14.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/1255709.jpg?v=1766579105","url":"https:\/\/doublestackstore.com\/products\/cmmg-9mm-ejection-port-cover-kit","provider":"Double Stack Store","version":"1.0","type":"link"}