Ordered a set of lower rails and an AMD-65 barrel extention from E.D.A. Manufacturing (they make the bend/weld flats). I had used their lower rails in my AMD-63 build and they worked well. When I got the package they had mistakenly added an extra set of rails. I had to let them know of their mistake (I felt guilty getting something I didn't pay for). I offered to pay/return the extra set and here was their reply.
Merry early Christmas. Thanks for your honesty.
Now I know this isn't some big purchase, but it's nice just the same.