Alexander Arms 416R stainless-steel button-rifled, 6.5 Grendel barrel featuring: 1:7.5 twist rate, black coated exterior, 5/8-24 TPI RH muzzle threading, 60-degree muzzle crown, and the barrel extension is installed.

Gas port is positioned at carbine-length. Manufactured by Alexander Arms and sold with exactly the same specifications as the Alexander Arms 6.5 Grendel 11.5" upper receiver assembly.

Fully-inspected and fully-prepared for assembly into an AR-15 platform rifle. Barrel weight is 1.5625 pounds. Gas block diameter is 0.875 inches.