“Enjoy a Tunnel Snakes-themed adventure, featuring the original Fallout 10mm pistol and a new Tunnel Snakes jacket.”— "Tunnel Snakes Rule!" Creation Club description
The Colt 6520 10mm autoloading pistol is a highly durable and efficient weapon developed by Colt Firearms prior to the Great War.[1] It proved to be resistant to the extreme conditions of the wasteland and is a fine example of workmanship and quality construction. Its simple design allows it to be easily manufactured with relatively basic equipment, making reproduction possible in workshops across the post-nuclear world. The Colt 6520's reliability and accessibility makes it very popular among wasteland denizens, for who sophisticated, high-maintenance weapons would be a liability to survival.[2] The classic 10mm pistol has the words "Model 6520" printed on the side, reflecting its make.
↑In-game description in Fallout and Fallout 2: "{801}{}{A Colt 6520 10mm autoloading pistol. Each pull of the trigger will automatically reload the firearm until the magazine is empty. Single shot only, using the powerful 10mm round. Min ST: 3.}"
↑Vault Dweller's Survival Guide p.5-15: "This is your basic ranged weapon. The 10mm round packs a goodly punch, and the Colt pistol is a fine example of workmanship and quality. It is a single shot weapon only, meaning that every time you pull the trigger, you will fire one, and only one, round of ammunition. The 6520 has no problem feeding hollowpoint ammunition for small game hunting, or armor piercing rounds for larger, bipedal game."