AR-15 5.56 20" stainless steel hbar barrel straight fluted

AR-15 5.56 20" stainless steel hbar barrel straight fluted. 1/2-28 thread for attaching muzzle device.

• Made from 416 stainless steel hardened to 26-32 rc and stress relieved. 1-8 rh twist.
• 5.56/.223 chamber
• .750" diameter under gas block.
• Rifle gas system
• Comes with barrel extension and extension pin installed. This barrel also has the gas port hole pre-drilled. Barrel extension has the m4 feedramps.