I'm originally from Massachusetts and they already have something like this in place (they still go by the '94 AWB if that tells you anything). Every gun sale is recorded on a form made by the commonwealth of Massachusetts and sent to an office which is supposed to keep them all on file and enter them into a database. Private sales don't have the background check, but you were still required to record the sale on the form and mail it in. You're supposed to have it post marked within 7 days of the sale or you supposedly face fines, etc. You're only allowed (4) person-to-person transfers per calendar year and then you must go through an FFL and go through the background check just like a new gun purchase (at $50 each time). If that's not bad enough, you must have a license for firearms and there's 2 types - one for rifles/long guns and one for pistols (which is your LTC and it covers all the other firearms). Without the pistol permit, you CANNOT purchase a handgun - new or used - in the state of Massachusetts. The licenses are given out at the discretion of your local police chief and he/she doesn't have to approve it even if you pass the background check. So, if you're in a town where the police chief hates giving out the licenses, you can't purchase firearms. Unfortunately, there are quite a few of those towns there. I moved to TN for a reason and definitely don't want to go back to that kind of system.