Since I keep getting asked about my original non-captive front pivot pin, and 601 lowers are now available, are you exploring the possibility of manufacturing 601 front pivot pins?
Yes, they are being made as we type.
They won't be available for a couple of weeks though.
I was going to try and use a velier ball screw, but it didn't have enough tension. So we will be doing them with the crimped in ball and spring style.