My hubby was concerned about this and did some research. It seems this (or something very similar) was actually proposed by one congress person several years ago, but it was quickly shot down. However, the rumor has continued to circulate at intervals ever since then. Interestingly, a police officer who teaches tactical training (and is definitely pro-NRA) was interviewed on a radio talk show today and was asked specifically about this. He also stated firmly that it is just a rumor at this point, and should be disregarded.