{"product_id":"aero-m4e1-assembled-upper-odg","title":"Aero Precision M4E1 Assembled Upper Receiver – OD Green Cerakote","description":"\u003cp\u003eThe Aero Precision M4E1 Assembled Upper Receiver in OD Green Cerakote provides a complete forged 7075-T6 aluminum upper with integrated forward assist and ejection port cover, ready for your barrel and handguard installation. This assembled upper fits standard mil-spec AR-15 lower receivers and features Aero's M4E1 enhanced design with a squared-off profile that mates cleanly with modern handguards. The OD Green Cerakote finish offers both corrosion resistance and a distinct appearance for custom build projects.\u003c\/p\u003e\u003cp\u003eThe upper is fully assembled with forward assist, ejection port cover, and dust cover spring already installed. The M4E1 design uses a proprietary barrel nut system (sold separately) that simplifies handguard installation and eliminates the need for timing shims. Forged construction ensures MIL-SPEC dimensions and durability. No barrel, bolt carrier group, or charging handle included—this is the upper receiver only.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlatform:\u003c\/strong\u003e AR-15 \/ M4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Forged 7075-T6 Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e OD Green Cerakote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Assembled Upper Receiver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeatures:\u003c\/strong\u003e Forward Assist, Ejection Port Cover Pre-Installed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Lower:\u003c\/strong\u003e Mil-Spec AR-15\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Upper Receiver Only (No BCG, Charging Handle, or Barrel)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Requires Barrel, Gas System, Handguard, BCG, and Charging Handle\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Aero Precision","offers":[{"title":"Default Title","offer_id":47944017707263,"sku":"APAR700220AC","price":159.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/2960745.jpg?v=1766612456","url":"https:\/\/doublestackstore.com\/products\/aero-m4e1-assembled-upper-odg","provider":"Double Stack Store","version":"1.0","type":"link"}