{"product_id":"rra-cmplt-car-a4-upr-350lgd-16-10rd","title":"Rock River Arms CAR A4 Complete Upper 350 Legend 16\" – AR-15 Platform","description":"\u003cp\u003eThe Rock River Arms CAR A4 Complete Upper in 350 Legend pairs straight-wall cartridge performance with AR-15 platform compatibility. Chambered in 350 Legend, this 16-inch complete upper assembly delivers effective hunting performance within straight-wall cartridge jurisdictions while maintaining familiar AR ergonomics and controls. The A4 flat-top configuration provides a full-length Picatinny rail for optics mounting.\u003c\/p\u003e\u003cp\u003eThis complete upper arrives ready to install on any mil-spec AR-15 lower receiver. Rock River Arms manufactures this upper with forged construction and a durable finish. The assembly includes bolt carrier group and charging handle. Installation requires only standard AR-15 takedown pins—no gunsmithing or permanent modifications needed. Includes one 10-round magazine.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e 350 Legend\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\u003eConfiguration:\u003c\/strong\u003e CAR A4 flat-top\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Bolt carrier group, charging handle, 10-round magazine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Drop-in with standard takedown pins\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rock River Arms","offers":[{"title":"Default Title","offer_id":47939756916991,"sku":"RRA350L0328","price":738.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/2950205.jpg?v=1766546442","url":"https:\/\/doublestackstore.com\/products\/rra-cmplt-car-a4-upr-350lgd-16-10rd","provider":"Double Stack Store","version":"1.0","type":"link"}