AR-15 5.56 11.5" stainless steel HBAR barrel 1-9 twist

AR-15 5.56 11.5" stainless steel HBAR barrel 1-9 twist. Comes as seen in picture with barrel extension and extension pin installed. This barrel also has the gas port hole pre-drilled. Barrel extension has the m4 feedramps.

• Made from 416 stainless steel hardened to 26-32 rc and stress relieved.
• 1-9 rh twist. 6 groove button rifled.
• Chambered in 5.56 nato (also accepts .223 rounds).
• Carbine length gas system .750"diameter under gas block.
  
• Standard 1/2-28 threads for attaching muzzle device.