From what I've heard the "kicked around" proposals for legislation fall into the following catagories: A) Reinstate the 94 AWB on new manufacture with no sunset. B ) Make "assault weapons" (assume all semi auto rifles and possibly pistols) subject to the NFA and require registration. C) Both A and B D) Both A and a confiscation on all existing "Assault Weapons". In the case of A, B or C an existing, papered, SBR would not be affected. It would already be in the NFA, and as already manufactured a ban on new manufacture wouldn't be applicable. In the case of D, people with papered NFA items would be among the first to get letters demanding they turn them in, if not agents showing up at their doors. Thankfully its the least likely, falling well behind the other three options and the "nothing happens" option. Honestly, I wouldn't worry about it.