I emailed Steve a bunch last night on the topic too. So it wouldn't be a problem getting, say, a RRA complete midlength barreled upper, shaving down the existing front sight (keeping the block of course) and putting another FS/SFB out further? I thought there would be issues with the barrel being .740" and the FSB using a .750"?
Thanks so much
PS the 1:7" isn't that important. It would be nice, but it's not an absolute requirement.