the mag locks are not the same as a bullet button…with a mag log the only way to remove the magazine is to remove the rear take down pin and swing the upper out of the way…this is considered disassembly, and disassembling an ar to swap out a mag is no different than disassembling a bolt action rifle to replace the internal magazine. the fact that the disassembly of an ar is much simpler doesn’t change the fact that the rifle is being disassembled (therefore the mag is not detachable). i know what you are saying though but lets live the technical thinking and redefining of words to the state, lets not help them turn us into criminals.
edit: if they decide to require tools to remove the mag i will gladly use the punch on my leatherman mut to push out the takedown pin.