BCA threaded barrels for Glock 17 handguns are manufactured by Bear Creek Arsenal in Sanford NC, USA. Durable and highly accurate, Bear Creek Arsenal threaded Glock 17 barrels are backed by our limited lifetime warranty. 4150 Black Nitride Barrel 1:16 Twist 9 MM Caliber Threaded Unbranded BCA barrels for Glock 17s are compatible with Glock Gen 1-4 pistols (not Gen-5). Thread Protector sold separtately: https://www.bearcreekarsenal.com/guns-parts/thread-protector.html ALL NFA LAWS APPLY {{widget type="Magento\Cms\Block\Widget\Block" template="widget/static_block/default.phtml" block_id="42"}}