Of course under the new classification, old .50s will need to be registered. If you don't, they will catch you through sales records (anyone who thinks the BATF is not doing this already, I have a bridge to sell you) and you will get a mandatory minimum federal prison term, no plea bargaining, no parole.
BLOAT, cache, and take names!
The bill is AB2222. Read about it here. .50 cal.ban
Many thanks to the Liberty Belles for the link!