This Bear Creek Arsenal AR-15 .300 Blackout Complete Pistol has a 4.5" m4 barrel with a parkerized finish, and features a 1:8 twist, with a micro-length gas system. This .300 Blackout pistol includes a 4" MLOK rail, a billet side charging upper receiver, a BCA AR15 Bolt Carrier Group, Flash Hider, Gen-2 side charging handle (patent protected), and mil-spec forged AR-15 multicaliber lower. 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"}}