@RyeOnHam That's what I thought, but I figured it's for all my uppers. If I could buy the best handgun and share the frame with my other handguns, 500 is not that much.
@mp7235 I'm editing it now but I just saw PWS just made one. The only thing I did different is it only took me 39 ft lb to get it to lock the pin in the castle nut groove, not 40, and I use a little Aeroshell 64 on the castle nut threads