This 5.56 chambered 20 inch Modern Series Barrel is machined from CrMoV steel with a QPQ Corrosion Resistant Finish and QPQ coated M4 feed ramp extension.
Specs:
Length: 20"
Profile: Government
Material: 4150 CMV
Chamber: 5.56mm NATO/.223 Remington
Feed Ramps: M4
Gas System Length: Rifle-Length
Twist Rate: 1:7
Muzzle Thread: 1/2x28
Coating/Treatment: QPQ Corrosion Resistant
Gas Block Journal Size: 0.750"