It will not have the range of a rifle, 150m at best. It will not be small and compact like a pistol. If anything, it combines the worst characteristics of both into one package and does neither well.
This is just not true, a pistol caliber carbine has one huge advantage over a pistol= shot placement.
And if there is one thing all the internet battles on calibers agree on shot placement is key, a stock makes a huge impact on shot placement, especially as you get older. For HD, obviously you want a one or two shot terminal stop. With a pistol,
most people aren't that good, especially in a stressful situation.
Now ideally that one stop shot would be a 12ga, a 5.56 AR, or a AK-74.
But the thing folks always forget is
permanent hearing damage. Listening to music, understading your wife and daughter in convseration is very important to living a happy life.
Why do HD recommendations never include earpro muffs? Folks will chop the barrel and add a $1000 2 lb suppressor to an AR for "HD" before they will consider storing a pair of muffs with their HD weapon.?
Alright, final list of guns formed.
* Mossberg 500 w/ 20" barrel.
* Hi Point Carbine in 45ACP
* AK-74 underfolder
* SKS
* Beretta Cx4 Storm
* Marlin 1896
Good luck with the AK-74 underfolder, it would have to be an expensive custom job. Look for an AK-74 side folder. My choice is an AIMS-74 clone (it is fully functional folded).
Add to your list the Keltec Glock sub2k, it is 2/3 the weight of the Storm. Mine has been completely reliable I think because it uses high quality glock mags which as we know the mag generally
makes the reliability factor of a gun.
For reasons stated above any HD weapon must have a light.
Ideally I would prefer a pencil barrel 12.5-14.5 AR, but it would require discipline to always keep the ear-pro with the rifle. And it is expensive to build a pencil barrel AR + you have the $200 tax stamp.
Another option, is the AMD-65, one of the lightest and lowest recoil AK-47's, tax stamp makes it very maneuverable. Reliable and inexpensive.