I got two ideas. The Kel-Tec PMR-30, it's only a 22 but with 30 of them who cares. Going in the other direction the S&W 460. Six rounds of instant death, will also shoot the 45 longs. Plus it makes your dick grow at least two inches. Neither is practical but fit the Bug Out bag scenario. If you want practical then I go back to my FNX 45. 15 +1. I believe there are extended mags for it. Ambidextrous safety. Decocker so you can fire the first round DA then go SA. It really is an all around hand cannon.