Normally, this question revolves around "which caliber should I buy?" I think from a preppers viewpoint, this is only half of the question. The other consideration besides caliber is surplus parts in the event the manufacturing element of the world stops (e.g., the EMP, CME scenarios). A lot of us are brand/format loyal. People either love Glocks or hate them. The same is true for 1911 fans. Some people are anti-polymer and only consider a "real" gun all metal. Fight the urge to pigeon-hole yourself for this question. Additionally, let's just go ahead and put to rest the most asked question: "If I could only have one gun . . . ." Who the hell only has one gun? Do you only have one tool in your toolbox. Kill that line of thinking right now. So, assume you already have other pistols and lose your favorite gun emotions and focus purely on the consideration of a prepper: What are the prepper considerations to choosing pistol? Based purely on prepper considerations, what pistol would you purcharse to arm a group of people? A question like this ALWAYS get opinions, so try and limit this by quantifying some characteristics of some common guns using the following criteria: Reliability is the gun high-maintenance? does it jam a lot? will it take any ammo (ball ammo & jhp, Russian)? Spare Parts are there a lot of spare parts available? after-market parts? are parts/mags hard to get? Market Share is the gun newly released? is the gun used as a service weapon? how many guns are in circulation at the moment? The concept behind asking these questions is to get you to focus on what pistol would be best if you couldn't go to the store for a while to get parts, get your gun fixed, or acquire new accessories. Some thoughts to ponder are: Come SHTF, what do most police officers carry? How many citizens own this firearm? Are there military stores of this pistol for which an armorer might have spare parts? Which gun will last the longest, without a lot of TLC, that will get me through some ordeal? The question is not "What gun do I prefer?" Here is a conceptual spreadsheet of what one might come up with the quantify what the best prepper pistol would be. Notice, that caliber is not an issue directly because the choice of pistol determines that: gun.............reliability.....spare parts.....market share....after market acc. --------------------------------------------------------------------------------- Glock 17........___________.....___________.....____________....________________ Glock 21........___________.....___________.....____________....________________ Glock 22........___________.....___________.....____________....________________ Beretta 92/M9...___________.....___________.....____________....________________ 1911............___________.....___________.....____________....________________ Sig P226........___________.....___________.....____________....________________ You can list more guns or characteristics, but keep the focus on prepping for the characteristics.