
Product Details
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 HPT (High Pressure Test) Barrels MPI (Magnetic Particle Inspected) Barrels