Stainless Lo-Pro Gas Block Barrel 6mm ARC w/ Headspaced Bolt

AR-15 .625 Diameter Aluminum Low Profile Barrel Gas Block by Guntec

Noveske Stainless Lo-Pro Gas Block 18 SPR Barrel 6mm ARC w/ Headspaced Bolt

6.5 Grendel Krieger Barrel 6.5 Grendel Krieger Barrel

5.56 13.9 Barrel Lo-Pro Gas Block AR 15 Barrels

Noveske Lightweight Contour 5.56 Barrel Up to $26.50 Off 5 Star Rating w/ Free S&H

6 Arc barrels Sniper's Hide Forum

Faxon Firearms AR-15 10.5 Gov't/Socom 5.56 Carbine-Length 4150 Barrel w/ Pinned Gas Block

Noveske Commando Barrel Headspaced Bolt AR-15 5.56x45mm 11.5 1 7 Twist

6mm ARC Bartlein