This 5.56 chambered 20 inch Modern Series Barrel is machined from 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish and QPQ coated M4 feed ramp extension.
This barrel features a longer .750 profile dimension necessary for proper installation of the OPS Inc 12th model collar and suppressor.
|Material||4150 Chrome Moly Vanadium|
|Finish||QPQ Corrosion Resistant|
|Gas System Length||Rifle|
|Gas Block Journal||.750|
|Twist Rate||1:7 inches|