BCM Standard 20" Govt 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