And how, pray tell, is a "real" firearm going to help defend against the most technologically advanced army in the world, who can take you out from half a planet away without you ever seeing anyone until you are ginsu-bladed in half (reference: https://www.pcmag.com/news/us-used-drone-carrying-knife-missile-to-kill-al-qaeda-chief)?
We don't need more firearms in personal hands when it comes to our national defence, we need alliances, a better standing army, and probably some form of nuclear deterrence. Thinking you'll make any meaningful difference with your personal firearm and a couple of hours on the gun range is the exact same magical thinking 2FA nuts keep using while the US government takes their rights and freedoms away.
If he actually gets rid of FPTP Mark would, in my opinion, go down in history as the most significant PM since John A. Macdonald.