KAHR was terrible in my case. My Class III dealer ordered an SBR from them, and two years later, after getting an incredible runaround, he refunded my money. Six months after that I found a WEST HURLEY M1 SBR in Florida. Getting it shipped to Ohio and BATF transfer to me added another year. Finally got my M1 Tommy, but took nearly four years from the time I plunked down my first dollar.