This Bear Creek Arsenal AR-10 22" heavy parkerized straight fluted 6.5 Creedmoor barrel has a rifle length gas system with a 1:8 twist rate. Use a Bear Creek Arsenal ar barrel in your next AR 10 build and experience superior performance back by a lifetime warranty! All finished barrels go through a 100% inspection process. Inspections Equipment includes CMMs and Air Gauges for the bores as well as visual and machine inspection. Shop more 6.5 Creedmoor Barrels! We recommend American Eagle: Open Tip Match 120 gr., Federal 120 gr. ammo. {{widget type="Magento\Cms\Block\Widget\Block" template="widget/static_block/default.phtml" block_id="42"}} Does not include gas block or gas tube