This BCA AR-15 complete 12.7x42 rifle length upper has an 18" parkerized Heavy barrel, and features a 1:20 twist rate, with a mid-length gas system. It includes a 15" MLOK Rail, an M4 flat-top billet upper receiver, a BCA AR15 bolt carrier group, and a side charging (Gen 2) handle (patent pending). This 12.7x42 is compatible with any mil-spec AR-15 lower. This has the new handguard.Shop more 12.7 x 42 Uppers!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"}}
