Do we really want enforcement of current laws?
If you get to thinking about it enforcing current laws is a very scary thing. There are a lot of laws on the books that could disenfranchise a large number of gun owners of their guns, especially in states like California where many types of guns must be registered.
Now if you or I are perfect citizens and we ain't never had no run in with the law in our life or ever getting in a fight where we broke someone's glasses more power to us!
However there are a large number of gun owners who made some very foolish mistakes in their late teens and early 20s who after all these years are responsible people. Even at the level of the FBI these offenses have been overlooked even if the records were available to the FBI.
These people will now no longer be able to own a gun.
As a member of the gun owners of America I believe there are a lot of laws on the books that should have never been passed including NICS and the required form 5573. So my stance is quite clear.