DTI UPPER RECEIVER AR15 M4 5.56 16 FLATTOP PRE

Barrel: Chrome Moly Vanadium - M4 Feed Ramps - 16 Length - 1x9 Twist - A2 Flash Hider - Manganese Phosphated - Phosphated under Front Sight Base - Taper Pins on A2 Front Sight Base - Threaded Muzzle - M4 Profile - Chamber: - 5.56 X 45 mm - Bolt And Carrier: Phosphated 8620 Steel Carrier Assembly - Carpenter 158 Bolt HPT/MPI Tested - Heat Treated and Plated - Mil-Spec - Chrome Lined Carrier Interior - Carrier Key - chrome lined attached with Grade 8 Screws - Properly Staked & Sealed Gas Key - Handguards: Carbine Length - Aluminum Delta Ring - Single Heat Shield - Upper Receiver: - Forged 7075 T6 Aluminum - A3 Flat Top With M4 Feed Ramps - Hard Coat Anodized - Mil-Spec - Ejection Port Cover and Round Forward Assist - Right Hand Ejection - Bore's surface is coated with dry film lube over the anodized surface