Colt LE6943 Upper Reciever Kit 5.56 Nato 11.5 in. Black Fits AR Rifles;Chambered In 223 Rem And 556 NATO;11.5-Inch Lightweight Barrel;Integrated Rail System;Folding Front Sight;Magpul Rear Backup Iron Sight;Black Finishtable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Item Category Code: 7600 Product Group Code: 7600O Product Sub Group 1: 7600O6 Inactive: No