I am the builder of this receiver. I got the unfinished receiver from a dealer in Minnesota. I worked for Group Ind. in the early 80's working on Uzi's,
.50 and .30 Brownings, BAR's and the Group Thompsons. I got the prints from Doug Richardson. The gun was at Tracie Hill's show several years ago. I have fired over 5,000
rds. through it. It works flawlessly. Carson Yeates If you have any more questions, you can contact me at 502-363-5373