The BCA AR-45 Barrel is a 7.5" heavy profile barrel made of 4150 chrome moly vanadium steel with a black nitride finish, a blow back gas system with a 1:16 twist rate. The barrel is chambered in .45 ACP and machined with no 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. {{widget type="Magento\Cms\Block\Widget\Block" template="widget/static_block/default.phtml" block_id="42"}}