{"product_id":"rra-cmplt-car-a4-upr-458-socom-16","title":"Rock River Arms Complete CAR A4 Upper .458 SOCOM 16\" – AR-15 Compatible","description":"\u003cp\u003eThe Rock River Arms Complete CAR A4 Upper delivers .458 SOCOM stopping power in a compact 16-inch configuration designed for AR-15 lower receivers. This upper receiver assembly features an A4 flat-top design with integrated Picatinny rail, allowing for versatile optics mounting while chambered in the hard-hitting .458 SOCOM cartridge—ideal for hunting large game or close-range defensive applications where maximum terminal performance is required.\u003c\/p\u003e\u003cp\u003eBuilt with Rock River Arms' precision manufacturing standards, this complete upper includes a 16-inch barrel with carbine-length gas system, bolt carrier group, and charging handle. The forged upper receiver is finished in durable black oxide, and the assembly is ready to install on any mil-spec AR-15 lower. Standard takedown pins allow for quick upper\/lower separation for transport or caliber conversion. Requires .458 SOCOM-compatible magazines and ammunition.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e .458 SOCOM\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 Forged aluminum upper receiver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black oxide\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 Direct fit to mil-spec AR-15 lower, standard takedown pins\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rock River Arms","offers":[{"title":"Default Title","offer_id":47939786801407,"sku":"RRASOC0564","price":789.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/2950214.jpg?v=1766546584","url":"https:\/\/doublestackstore.com\/products\/rra-cmplt-car-a4-upr-458-socom-16","provider":"Double Stack Store","version":"1.0","type":"link"}