Colt AR-15 Pistol Upper Receiver Assembly 5.56x45mm Monolithic Rail

The Colt AR-15 Upper Receiver Assembly with Monolithic Rail comes complete with charging handle, bolt and bolt carrier assembly. Featuring a flat-top upper receiver with plenty of picatinny slots that offer the shooter maximum versatility when it comes to mounting accessory devices. Unique to this upper receiver, is the free float monolithic rail which is machined together in conjunction with the upper receiver portion of the upper assembly. The monolithic rail presents the user with an extremely versatile single plane rail which eliminates the chance of front mounted accessories being canted or unlevel. The Colt Upper Receiver also features a free-floating barrel which is designed to enhance accuracy and target acquisition.