Really? Could you offer up a reason?
I think taxslave just did, I don't own one because they are too small a calibre for anything larger than coyotes in NS, but are very effective on deer and are legal in other jurisdictions. But it doesn't end there, there are those who say citizens have no reason to own pistols, because they can't think of any reason
they would need one. Then there are those, like Allen Rock, who can think of no reason citizens should own firearms at all.
However, having handled fully auto, semi-auto and weaponry that has one aim (to inflict death upon an adversary) I still fall back to my position that there is no need for civilians to possess semi-automatic weaponry, which by the way can be converted to full auto if you have any aptitude regarding the mechanics of weapon.
You know then the usefulness of a semi auto, you don't have to take your eyes off your target if you miss or don't get a clean kill shot. I can shoot three birds without taking my finger off the trigger of my shotgun as well. As for the relative ease at making a semi auto into full auto, because it is possible is not grounds for banning them. The same could be said for owning a Ferrari, because they can go 200mph doesn't mean it is legal to do so, but we don't ban them either.
As a retired Gunner who served in the Artillery I would love to own a mortar, some grenades, even a light artillery weapon, however there is no practical use for me to have any of these items and having them would only pose a risk that someone might use them for the purpose they were designed.
Too kill.
Full stop...
I would just love to be able to afford to feed some of those things, but you are now talking about weapons of war, and explosives, none of which could be considered defensive except in battle. Aside from grenades, I don't have an issue with someone owning the things, some people do, the storage of ordnance may be an issue though, as well as where you might want to go and bang them off.
All weapons were designed to kill, it is what mankind has been doing forever. That is one thing that is not going to stop.