They are old guns and they wear out.
Bullshit. New old stock parts are readily available for any firearm you can think of. Ebay is even a great source for firearms parts: If I have a firearm that's not worth restoring or would cost too much to restore, I part the damned thing out and sell the parts on Ebay for pretty good money. I can pick up junk guns at garage sales for around $20 and make a couple hundred dollars off the parts alone.
Irrelevant... They become less numerous all the time according to your own stats... They are already well regulated. End of story.
So if that are already "well regulated", what's your problem with any law-abiding citizen owning them?
Likewise, if there are already laws on the books which disqualifies criminals from purchasing firearms, what makes you think that additional laws would also work?
The regulation that is good is that they are no longer produced for civilians and are no longer a threat d u h.
Obviously the laws need more teeth d u h. Something is really wrong with your brains, dupes.
They never were a threat....duh. The gangsters stole them from the cops, and the military, but they rarely did anything to the civilian population with them. Most criminals knew back then to leave the civilian population alone. Which is why when there was an aberration, such as bonnie and clyde, or jesse james, who actively sought to kill civilians, they were reviled and hunted down fairly quickly because the general population hated them.