The BCA AR-10 Barrel is a 20" straight fluted heavy profile barrel made of 4150 chrome moly vanadium steel with a black nitride finish, a rifle length gas system with a 1:8 twist rate. The barrel is chambered in 6.5 Creedmoor and machined with AR-10 feed ramps in the barrel extension. All Finished Barrels go through a 100% Inspection Process. Inspections Equipment includes CMMs and Air Gauges for the Bores. BCA's expectations is that our Barrels, 16 inch or longer, will hold a 1.000" MOA at 100 yards with appropriate ammo and shooting techniques. {{widget type="Magento\Cms\Block\Widget\Block" template="widget/static_block/default.phtml" block_id="42"}}