I feel like I’m channeling my inner Jeff Cooper here, but...
It’s always interesting to me when people debate summer guns and winter guns. I don’t have any of those. A gunfight is a gunfight and that’s what I prepare for.
Lately, I’ve been carrying either a Goverment Model 1911 with a light, or a Glock 19 with light and RMR. Prior to my department adopting Glocks, I carried an H&K HK45 or a 1911. I carry two extra magazines regardless of which gun I’ve got with me. Like
@Red Flag 1 I switched to an appendix rig (I like PHLSTER, Raven Concealment and Comp-Tac) and carry the mags IWB as well. Honestly, the appendix rig was chosen to keep the butt of the gun from rubbing against the seat in my truck but it works great.
Larger guns are easier to fight with. They have better sights, better sight radii, better ballistics, better capacity and their controls are easier to work under stress.
I own a G43 but it’s a BUG. Conversely I also own a G34 and carry it with a light without difficulty.
You can carry a full-size fighting pistol without difficulty with just a little thought.