KS-23
The KS-23 (Russian: Карабин Специальный-23, romanized: Karabin Spetsialniy-23, lit. 'Special Carbine-23') is a pump action shotgun manufactured by Russian company Tula Arms Plant. The KS-23 was developed by TsNIITochMash in the Soviet Union for use by the Ministry of Internal Affairs.