^Outdoor Life Team (April 20, 2021). "Gun Review: Smith & Wesson's 460XVR Revolver". Outdoor Life. Retrieved March 7, 2024. Introduced in 2005, the 460XVR (Extreme Velocity Revolver) is built on the same massive five-shot, double action X-frame that houses the S&W 500 Magnum.
^ Rusty S. (March 3, 2021). "Wheelgun Wednesday: Czech Revolver – The ZKR-551". The Firearms Blog. Retrieved March 10, 2024. The ZKR-551 was manufactured by Zbrojovka Brno. From 1957 until 1971, about 2500 of these guns were made, chambered in 7.62 Nagant, .22 LR, .32 S&W Long (a popular UIT/ISSF competition chambering) and by far the most used in competition, .38 Special. A further run of 300 pieces was made during Zbrojovka Brno's second incorporation in the 1990's-2006. They were a success in the UIT competitive setting, helping Czechoslovakian shooters win and place well.