This is a Ballistic Advantage Barrel known as the Modern chambered in 556NATO, model BABL556020M.
This 5.56 chambered 18 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.
Features:
4150 Chrome moly vanadium
SPR profile
QPQ finish
Rifle-length gas system
1:7 twist
