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 Right Side Charging Handle (Gen 2, patent pending). It is chambered in 6.5 Creedmoor. This has the new handguard. This 6.5 Creedmoor upper is compatible with 1st gen DPMS low profile lowers.Shop more 6.5 Creedmoor Uppers!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