12.5" Carbine Upper Receiver Group

12.5

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

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