Features: New enhanced forging that gives the upper receiver a "billet look" New picatinny profile that blends seamlessly with our Enhanced and ATLAS Series Handguards M4 Feedramps .250 takedown pin holes Includes threaded forward assist roll pin DOES NOT include port door or forward assist Includes: M4E1 Threaded Upper Receiver in Magpul™ FDE Cerakote SPECS Specs Made In America? Yes Platform AR15 Material Machined from 7075-T6 forged aluminum Finish Magpul FDE Cerakote Compatibility Works with standard AR15/M16 components Weight(s) 6.9 oz Other Barrel Nut Torque - 50 ft-lbs