This BCA AR-10 Complete Upper has a 18" 416R Stainless heavy barrel, and features a 1:8 Twist Rate, a rifle length gas system. It includes a 15" MLOK Split Rail, an M4 flat-top billet upper receiver with forwarding assist, a BCA Bolt Carrier Group, a Flash Hider, and a Side Charging Handle (Gen 2, patent pending). It is chambered in 6.5 Creedmoor. This rifle comes on the BCA AR10 forged Lower engraved then anodized. Shop more 6.5 Creedmoor Rifles! Check out Magazines here! {{widget type="Magento\Cms\Block\Widget\Block" template="widget/static_block/default.phtml" block_id="56"}} *Note - We strive to provide the most accurate photographs of our product. Variations may occur in the skeletonized section of the handguard/flash hider you receive. {{widget type="Magento\Cms\Block\Widget\Block" template="widget/static_block/default.phtml" block_id="42"}} It is the responsibility of the consumer to ensure all state, local, federal, and ITAR regulations are followed