I have several different pistols and solid stainless steel revolvers in my gun safe. They all weigh a good bit more since they are solid stainless steel. The big Glock 40 Super you mention cannot be shot inside a house without taking out everyone's ear drums due to the muzzle brake. As you remember, it was a heavy gun also.
I can't handle the grip weight of the most potent of these larger guns any longer. I am old and feeble, or getting there.
The Glock 22 (my smaller Glock 40 caliber), even apart from using the long clear magazine, is about as much as I can handle while sitting in my powered wheel chair. If I was in carry mode, it would have a stock black Glock barrel in place and look like what it is, a bone stock LEO issue service Glock 22 trade in gun.
MM, you have downsized yourself into low capacity Mouse Guns which is a mistake as those little things aren't going to get the job done when facing a 9mm wielding attacker.
Everyone is packing now-a-days, so you face off with the one who is going to shoot you first and a couple of his buddies that he is running with.
Good luck with a double barrel derringer.
The odds are against an old person to begin with, my first group attack move against me would be to push my wheel chair over.
Then I would kick the shite out of me in the head until I was all bloody and unconscious and then rob me at your leisure.
In wheel chair attacks knives are most commonly used on the cripple as wheel chair bound are not rated as being worthy of taking out your gun.
hint ...... don't bring a knife to a gunfight ....... Interesting point made by several 9mm "5 BEST 9mm pistols" reviews is that the Glock 19 AND ALL OF THE CURRENT COMPETITORS TO THAT GUN all only have a 15 round capacity in 9mm as their grips were shortened to maximize these guns conceal-ability.
This is the 15 round count that is most commonly available across the board now, anyway.
Hey, this is the exact same round count as my ex-police Glock G22 40 cal S&W, so the most modern Glocks have just gone "round count equal" and have given away their magazine capacity advantage.
Next, note that 10 round capacity pistol magazines are likely making a comeback soon, mandated by somebody or other agency that actually lacks the authority to make up this sort of restriction. As such this restriction if it comes about may be short lived just like the previous magazine restrictions were.