The Obama Administration’s Bureau of Alcohol Tobacco and Firearms proposed a new regulation that would effectively ban the most popular bullets used in AR-15 semi automatic rifles. ATF said the 5.56 mm M855 Green Tip rifle bullet can now be used in handguns and therefore represents a serious threat to law enforcement because these bullets can penetrate the armor commonly worn by police. “With few exceptions, manufacturers will be unable to produce such armor piercing ammunition, importers will be unable to ... Log in to view full article.