They better lawyer up. They are outside of their mandate doing this. To restrict M855 will take an act of Congress as the projectile does not meet the criteria of AP as defined in Federal Law.
But please, go right ahead ATF. We’re about to kill the MG ban and we’ll kill the AP ban next. Keep feeding us ammo to fling right back in your faces.
Just like amnesty requires an act of Congress. Yep nothing to worry about here.