AR-15 5.56 16" stainless steel bull barrel x-treme fluted

AR-15 16" stainless steel bull barrel x-treme fluted. Chambered in 5.56 nato (also accepts .223 rounds).

• Made from 416 stainless steel hardened to 26-32 rc and stress relieved.
• 1-9 rh twist.
• 6 groove button rifled.
• .936" diameter under gas block.
• Target crowned
• Comes with barrel extension and extension pin installed. This barrel also has the gas port hole pre-drilled. Barrel extension has the m4 feedramps.