This Bear Creek Arsenal AR-15 Complete 7.62x39 pistol length upper has a 10.5" heavy barrel with a parkerized finish, and features a 1:10 twist rate, with a Carbine length gas system. It includes a 9.5" MLOK rail, a M4 flat-top forged upper receiver, a BCA Bolt Carrier Group, Flash Hider, and a rear charging handle. This 7.62x39 upper is compatible with any mil-spec AR-15 lower. Shop more 7.62 x 39 Uppers! Featuring a 7.62x39 enhanced firing pin for increased reliability for steel cased ammo and upgraded bolt. Magazine not included. 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"}}