The Ballistic Advantage 5.56 NATO chambered 16-inch HBAR Mid-Length Classic Series Barrel is machined from CrMoV steel with a chrome lined bore and chamber with a manganese phosphate finish and phosphate coated M4 feed ramp extension. This heavy profile barrel is marked with an HBAR engraving

• Chrome Moly Vanadium
• Heavy Profile
• Phosphate Finish
• 1:7 Rifling"
• Mid-Length Gas System
• 1/2×28 Threaded