DealSKU B556CM41619(P) Weight 1.8000 Length 16 Profile Contour Twist 1:9 Finish Parkerized Material 4150 Chrome Moly Vanadium Thread Pitch 1/2 x 28 Caliber 5.56 NATO Feed Ramp M4 Flutes N/A Gas System Carbine Gas Block System 0.750 Gas Hole Diameter 0.072 Charging Style No from Bear Creek Arsenal (Product B556CM41619(P)) |