1. KS-23
The KS-23 is a Russian shotgun, although because it uses a rifled barrel it is officially designated by the Russian military as a carbine. KS stands for Karabin Spetsialniy, "Special Carbine". It is renowned for its large caliber, firing a 23 mm round, equating to 6.27 gauge using the British and American standards of shotgun gauges and approximately 4 gauge using the current European standards (based on the metric CIP tables), making it the largest-bore shotgun in use today.
![Image](http://www.arms-expo.ru/upload/iblock/761/761ed570acae36fb738e77312619c5e8.jpg)
2. The RSh-12 revolver
For whatever reason, Russian designers took to creating a revolver to fire their 12.7x55mm cartridge
![Image](http://alternathistory.com/files/resize/users/user543/0_da524_8fbe3029_XXL-680x482.jpg)
"Heavy is good, heavy is reliable. If it doesn't work you can always hit him with it."
-Boris the Blade, Snatch