This Bear Creek Arsenal AR-15 5.56 NATO Complete Rifle has a 16" M4 barrel with a parkerized finish, and features a 1:7 twist, with a mid-length gas system. This 5.56 AR-15 includes a 15" MLOK rail, a billet upper receiver, a BCA AR15 Bolt Carrier Group, Flash Hider, rear charging handle, and mil-spec forged AR-15 multicaliber lower. Shop more 5.56 NATO Rifle! 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="90"}} {{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"}}