Colt M4 Flattop upper with 14.5" M4 SOCOM heavy barrel. Upper receiver is marked C AF on the right side and M4 over the gas tube hole. Upper receiver does not have RAS "T" marks. The 14.5" SOCOM barrel has "F" marked Front sight base, M4 fat Handguards, and a permanently attached YHM Phantom Flash hider. The upper is all Colt and is not a military return. This unit is in great shape. No B/BC/CH or carry handle included. $515.00 shipped or $500 FTF in KY.