This BCA AR-15 complete .458 SOCOM rifle length upper has a 16" heavy barrel with a parkerized finish, and features a 1:14 twist rate, with a carbine length gas system (.936). It includes the new 15" MLOK rail, an M4 flat-top billet upper receiver, a BCA bolt carrier group, and a gen 2 right side charging handle (patent pending). This .458 SOCOM upper is compatible with any mil-spec AR-15 lower. Shop more .458 SOCOM Uppers!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"}}