AR-15 5.56 20" stainless steel bull barrel diamond fluted. Made from 416 stainless steel hardened to 26-32 rc and stress relieved.
1-8 rh twist. 6 groove button rifled.
Chambered in 5.56 nato (also accepts .223 rounds).
.936" diameter under gas block.
Rifle length gas system
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.
.750" diameter under gas block.
Rifle gas system
Comes with barrel extens..
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