Lol, that guy is total pillock!
Like with any software, criminals would just find ways to 'hack it' to make put them selves back in full control of their weapon. (Or just obtain 'dumb' guns on a black market from the some 200 million of them already in circulation or illegal imports).
Also where would it leave the 2nd amendment if the authorities had the means to hypothetically disable all non government issue firearms electronically? Doh!