Thread Protector for 9MM Factory Replacement for Glock Barrel made out of 9310 steel with a black nitride finish. Screws on. Features: Thread Protector 9MM Factory Replacement for Glock Barrel Compatible Black Nitride Finish 9310 Steel {{widget type="Magento\Cms\Block\Widget\Block" template="widget/static_block/default.phtml" block_id="42"}} It is the responsibility of the consumer to ensure all state, local, federal, and ITAR regulations are followed