AGL Arms .45 Long Colt

The .45 Long Colt (EF Auto Ejecting, Double Action) is Vash's and Knives's weapon of choice. The .45 Long Colt cartridge was a low pressure cartridge at the turn of century due to its use of black powder, which would makes the range and penetration depicted in the anime conflict with real live performace of the cartrdige. On the other hand modern day loadings with modern smokeless powders can produce ballistic properties equal or even surpassing that of a 44 magnum. These guns aren't based off of normal revolvers, but are most likely a mash-up of various features from real world revolvers. Such as the break top reloading from a Smith and Wesson Schofield revolver. The bottom of the cylinder firing of a Mateba revolver (Chiappa's Rhino wasn't around yet). Also possibly the barrel of a Dan Wesson full underlug barrel (though inverted). Vash and Knives use these guns to use the Angel Arm. Vash's gun is silver, while Knives's gun is black. It's unkown whether these guns were salvaged or built by Knives in the story, all that is known is that Knives left Vash out of an old SEEDS ship for a whole year and returned with them. Vash shot Knives in the leg and stole his revolver after Knives had shown him the destructive power of the two guns, Knives eventually took his back from Vash durring the July incident and cut off Vash's arm to retrieve it.