This BCA AR-15 complete 6.5 Grendel Slick Side rifle length upper has a 16" M4 barrel with a parkerized finish, and features a 1:8 twist rate, with a carbine length gas system. It includes a 15 1/4" MLOK rail, an M4 flat-top 7075 billet aluminum upper receiver, a BCA bolt carrier group, a flash hider, and a rear charging handle. This 6.5 Grendel upper is compatible with any mil-spec AR-15 lower. This has the new handguard. This Slick Side upper has no forward assist or dust cover. Bear Creek Arsenal manufactures all AR-15 rifles, complete upper assemblies, barrels, bolt carrier groups (bcg), and components in-house here in Sanford, NC. Choose an American-made AR-15 complete upper assembly from Bear Creek Arsenal, designed for high accuracy and backed by a lifetime warranty. Visit our YouTube channel to see our AR-15s and AR-10s in action and get answers to common questions about your gun. Shop more 6.5 Grendel 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"}}