BCM Standard 11.5" Upper Receiver Group

Features:

•M4 Feed Ramp Barrel Extension
• M4 Feed Ramp Flat Top Receiver
• T-Marked Upper Receivers
• USGI 1/7 Twist Rates
• USGI 5.56 NATO Chambers
• Mil-Spec 11595E - Certified Barrel Steel (CMV)
• Chrome Lined Bore and Chamber
• Manganese Phosphate Barrel Finish
• Mil-Spec F-Marked Forged Front Sights
• USGI Government Profile Barrels
• HPT (High Pressure Test) Barrels
• MPI (Magnetic Particle Inspected) Barrels