I talked the owner of Lanxang Tactical. He is a good guy with a A1 operation. His build techniques are second to none. Clean like a surgeon at the time. We spoke for an hour that day I visited. I thought it was a parts supplier but we sat in the truck and talked for an hour. He is a good dude. I know at the time he used Walther Luthar barrles in his AR15'S that might have changed.