Of course the fact that someone suffers from Alzheimer's should never be a reason for taking a person's gun licence away.
It would only mean that the blameless melon on the kitchen table mistaken for an intruder, would, because of short term memory loss, be shot twice over rather than only the once usually necessary to kill the b'astards.
Simonov SKS have been made under license by all sorts of Oinks. The Russians gave the design to all and sundry. Best price I could get today was £145
I doesn't alter the fact that if a nutter gets hold of a gun, knife, baseball bat or whatever some one is going to get hurt.