A review of the timeline:
January 2015: ATF published a new, OMB approved Regulation Guide stripping AR-15 “green-tip” from its armor piercing exemption list.
February 2015: ATF proposes a ban (which they’ve already put in place through their handbook published in January) on AR-15 “green-tip” ammunition and opens up a comment period.
March 16, 2015: The comment period about the proposed/already implemented ban on AR-15 “green-tip” ammunition closes, ATF ignores tens-of-thousands of comments because they were never going to consider them in the first place, and continues with the regulations outlined in the new 2014 Regulation Guide.
ATF changed the law unilaterally, didn’t tell anyone about it and has now put up a bogus comment period that means nothing. Because of these actions, ATF and the White House have not only failed to follow the Administrative Procedure Act, but has gone around Congress to violate the Second Amendment rights of Americans.