What are peoples thoughts on SBR's. On some guns it makes them more usable. Say like the GSG MP40P. It 's useless in the pistol form but with a stock on it, it seems much easier to use. Or an Uzi, it usable in it's rifle form. With the short barrel on it it's got the original look to it and it's still usable. With SBR's there are the legal issues with them too. You can't just lend it to a friend, you have to ask permission to take it over state lines and there is the $200 tax stamp. Just wondering what peoples thoughts are on it. I have a few guns that I would like to SBR but trying to figure out if it is worth it or not.