Well, I come from a country with heavy gun restrictions. The problem with abortions are various rights groups - political, religious, feminist, civil libertarians, childrens rights, medical professionals. If the child would be born, only to live in agony for half a day before dying, I'm for abortion. If the woman is simply "not ready", then, their body or not, they've a responsibility for another life. Eliminating the life for what seem to be frivolous reasons - adoption options are available. If the woman has been raped... That's a more complex issue. Not carelessness or immaturity by the woman, but rather having had her rights violated.
But the child is not at fault; there is the complexity. Two sets of rights.
As for firearms; the bad guys, gang members, bikeys, lunatics always get their hands on weapons. Illegal Chinese imports, mostly.
If someone is going to break the law and rob or murder, why would they have qualms about breaking gun control laws?
Personally, I don't like the idea of facing off against a guy with a shotgun robbing a store, whilst I'm unarmed! Once a store did, in fact, get robbed by a shotgun weilding nut not even five minutes after I walked out the door. Good thing I didn't shop around!
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Oh, well, fancy that! Isn't that neat, eh?