Lead & Steel Llc LS9MM4.5-28 AR9 9mm Luger 4.50" Threaded Black Nitride Chrome Moly Vanadium
https://www.tandktactical.com/shop/7427053012584-lead-steel-llc-ls9mm4-5-28-ar9-9mm-luger-4-50-threaded-black-nitride-chrome-moly-vanadium-57821
https://www.tandktactical.com/web/image/product.template/57821/image_1920?unique=6789078
Blowback gas system, no gas block or gas tube needed. Compatible with standard mil-spec uppers and dedicated uppers
