FN M16A4 factory original uppers, Charging Handle and BCG not included. These are in NOS condition with some minor handling marks. The upper includes an original FN USGI Mil Spec chrome lined 20″ cage coded barrel with 1/7 twist, a P&S Products Co. M5 RAS Picatinny hand guard assembly with rail covers and a USGI cage code marked MaTech 600 meter rear sight.