TsKIB SOO

The Central Design and Research Bureau of Sporting and Hunting Arms, abbreviated TsKIB SOO (ЦКИБ СОО) is a Russian small arms design bureau based in Tula, Russia. It was established in 1946, and it is currently managed as a branch of the KBP Instrument Design Bureau.

Products
Notable products designed at TsKIB SOO include:
 * high-quality custom hunting shotguns (MTs 5, MTs 6, MTs 7, MTs 8, MTs 30, MTs 109, MTs 110, MTs 111, MTs255, etc.)
 * TKB-022PM, TKB-0146, TKB-408, TKB-517 assault rifle prototypes
 * OTs-38 Stechkin silent revolver
 * OTs-12 Tiss assault rifle
 * OTs-14 Groza assault rifle
 * OTs-28 23mm shotgun (ru:ОЦ-28)
 * ASh-12.7 12.7 mm battle rifle
 * OSV-96 12.7 mm sniper rifle
 * 12.7mm NSV machine gun and Afanasev A-12.7 machine gun
 * 40mm GP-25/GP-30/GP-34 and RG-6 grenade launchers
 * AGS-40 Balkan 40 mm automatic grenade launcher
 * Afanasev Makarov AM-23 aircraft cannon
 * "Rys" ("Lynx") series of shotguns