With ATF's attemp being stifled, Democrats are using legislative methods to ban M855 ammunition. Connecticut's Senator Blumenthal and Murphy is introducing legislation to ban the ammuntion from non-mlitary and non-police use.
http://www.guns.com/2015/03/16/citing-public-safety-concerns-dems-now-seek-outright-ban-on-green-tip-ammunition-video/
From: Guns.com