.308 AR weapons have been around for decades. The comments regarding .223 being an ineffective killing round in the context of someone shooting up a school or similar confined area is absolute horse shit.
And again, in the context of a school shooting (as clearly stated in my reply) be it real or fake, the design of a 223 round means absolutely fuck-all to anyone except you mentats sucking each other off on the board.
Making a meme that it's not designed kill isn't helpful. It can, does and will kill.