I can't tell who is poking fun at the argument and who actually thinks he was being literal. Is this post supposed to be a joke? I don't see it. Sounds like a response to a literal interpretation. He's obviously not being literal. To suggest that he's suggesting that guns are a part of the solution, you'd have to take what he said as a literal suggestion. No way he meant it literally. It's a take on the old "the unborn can't vote" idea.
What he is advocating is impossible literally or figuratively. The unborn do not (as yet) have the same, or part, or similar rights as the living. Banning abortions via the US Supreme Court or the Court changing/altering the ruling, could be the "gun" to permit states to outlaw abortions individually, that would be the bullet(s) to "shoot down" womens' rights over their own bodies.
An unfertilized ovarian egg in a woman's womb could be a victim too, when the sperm "bullets" from rapist(s) "gun" reach it and one successfully fertilizes it. The issue is then made as to when the soon resulting fully formed embryo is considered to be a life, even if it is not yet "alive". But most practising Christians consider life to begin even earlier, immediately upon conception.
But I do not consider all of those who claim that life begins upon conception, to truly be "pro-life". Instead, most are really pro-zygote. Their hypocrisy begins upon birth, however, b/c most
also believe in the conservative mantra of "personal responsibility" which means that immediately after delivery, should the mother and newborn lack sufficient if any funds, (whether saved, donated, loaned, or hocked) credit, and/or insurance to pay for the birth, including any pre and/or post-natal complications, then either or both can then just drop dead right there, upon the delivery-room floor.
Disclaimer: I am pro-choice, b/c I believe that I do not have the right to dictate by vote or influencing through campaign contribution(s) to help to elect representatives who would introduce and promote legislation meant to ban or outlaw abortions, should states be given the ability by a SCOTUS overturn of the Roe vs Wade decision, but I also am personally opposed to abortion, as far as my involvement in impregnating a woman. I would try to convince her to carry "our" embryo(s) to term, then decide whether to keep the infant, or give the baby up later for possible adoption.