This Bear Creek Arsenal AR-15 Complete 5.56 rifle length upper has a 20" heavy barrel with a parkerized finish, and features a 1:7 twist, with a rifle length gas system. It includes a 15" MLOK rail, a M4 flat-top billet upper receiver, a BCA bolt carrier group, flash hider, and a right-side charging (gen 2) handle (patent pending). This 5.56 upper is compatible with any mil-spec AR-15 lower. This has the new handguard.Shop more 5.56 NATO Uppers!Magazine not included. Check out Magazines here!{{widget type="Magento\Cms\Block\Widget\Block" template="widget/static_block/default.phtml" block_id="56"}}{{widget type="Magento\Cms\Block\Widget\Block" template="widget/static_block/default.phtml" block_id="98"}}{{widget type="Magento\Cms\Block\Widget\Block" template="widget/static_block/default.phtml" block_id="91"}}{{widget type="Magento\Cms\Block\Widget\Block" template="widget/static_block/default.phtml" block_id="42"}}