Who's talking about concessions? This is all about salvaging something from an otherwise grim situation. If we can get grandfathering without registration, and given the presumed effective date of July 1st, people will be able to stock up on lower receivers (and other things) between now and then. And, because the proposed UBC's won't kick in until then, either, these newly-acquired guns will be effectively untraceable. The antis obviously want registration because it would facilitate their plans for eventual confiscation. But, remember, this would not be a sudden kick-in-the-door scenario. Confiscation would take further legislation, and, thus being given plenty of warning, you could remove the guns from the state.