AR-15 300 AAC 7.5" stainless steel blackout pistol barrel 1-7 twist

AR-15 300 AAC 7.5" stainless steel blackout pistol barrel 1-7 twist. 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).
• .750"diameter under gas block.
• Standard 1/2-28 thread for attaching muzzle device.
• Comes with barrel extension and extension pin installed. This barrel also has the gas port hole pre-drilled. Barrel extension has the m4 feedramps.