AR-15 16" stainless steel bull barrel x-treme spiral pulse 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.
Carbine length gas system
Target crowned
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.