{"product_id":"aero-m4e1-t-upper-5-56-16-blk","title":"Aero Precision M4E1-T Complete Upper 5.56 NATO 16\" – AR-15 Platform","description":"\u003cp\u003eThe Aero Precision M4E1-T complete upper assembly delivers a mil-spec 5.56 NATO configuration in a 16-inch mid-length gas system, compatible with standard AR-15 lower receivers. This upper is built on Aero's enhanced M4E1 threaded receiver, which features an integrated upper receiver and handguard mounting system for improved alignment and a cleaner profile. The 16-inch barrel meets the federal minimum for rifles, making this a versatile choice for general-purpose shooting, training, and home defense applications.\u003c\/p\u003e\u003cp\u003eMachined from 7075-T6 aluminum with a Type III hard-coat anodized black finish, this upper is ready to install on any mil-spec AR-15 lower. The assembly includes a bolt carrier group and charging handle, so it arrives ready to function once mated to a compatible lower. Installation requires only standard AR-15 takedown pins—no gunsmithing needed. Verify headspace and function-check before live fire, as with any upper\/lower pairing.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e 5.56 NATO \/ .223 Remington\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Complete upper assembly\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\u003eBarrel Length:\u003c\/strong\u003e 16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 7075-T6 aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Type III hard-coat anodized black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Bolt carrier group, charging handle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Drop-in, requires headspace verification\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Aero Precision","offers":[{"title":"Default Title","offer_id":47944017838335,"sku":"APAR700305M7","price":624.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/2854461.jpg?v=1766612471","url":"https:\/\/doublestackstore.com\/products\/aero-m4e1-t-upper-5-56-16-blk","provider":"Double Stack Store","version":"1.0","type":"link"}