Here is what I like to have:
Keltec Sub2000 9mm in S&W M&P , in folds up to 16.25 inches, perfect for behind the seat with a 17 rd mag. I also carry a S&W P9 Compact that can use the same mag.
I have one of the same but it uses the glock 17 mags, I purchased some 33rd mags a few year ago before they got stupid prices.
Yep folds to a small. bag size and three 33rd mags fit in the seat back stash area behind the passenger seat real nicely .
This is Texas , they don't even flinch at that