Our BCA barrels for Glock are NOT compatible with the Gen 5 model. Only Gen 1 through 4.BCA Replacement Barrel for OEM Glock 17 are manufactured by Bear Creek Arsenal in Sanford NC, USA416R Stainless Steel BarrelBear Claw Fluted1:16 Twist9 MM CaliberThreadedUnbrandedThread Protector sold separtately: https://www.bearcreekarsenal.com/guns-parts/thread-protector.htmlALL NFA LAWS APPLY{{widget type="Magento\Cms\Block\Widget\Block" template="widget/static_block/default.phtml" block_id="42"}}