page_title: MT-LB
section_title: Bulgaria
hierarchical_section_title: MT-LB / Variants / Bulgaria
context_page_description: The MT-LB is a Soviet multi-purpose fully amphibious auxiliary armored tracked vehicle, which was first introduced in the 1950s. It is also produced in Poland, where its YaMZ engine was replaced by a Polish one.
context_section_description: MT-LB AT-I – tractor for mine-laying systems. Fitted with racks for anti-tank mines.
  MT-LB RHR or MR HR (mashina za radiatsionno i khimichesko razuznavane) – NBC reconnaissance vehicle with detection, alarming, sampling and markings devices.
  MT-LB SE – ambulance.
  SMM B1.10 "Tundzha" (samokhodna minokhv'rgachka) – mortar platform with M-38/43 120 mm mortar and 58 rounds.
  SMM 74 B1.10 "Tundzha-Sani" – improved version with 2B11 120 mm mortar.
  KShM-R-81 "Delfin" – command and staff vehicle with R-123M, R-130M and R-31M radios, an AZI frame antenna, a generator and an additional cupola on the hull roof.
  MT-LB TMX – mortar carrier with 82 mm mortar M-37M.
  BRM "Sova" (bronirana razuznavatelna mashina) – reconnaissance version with NBC detection system ASP-3 and VPHR, radio sets R-123M and R-31M, PAB-2 aiming circle and NSPU night vision device. Comes in three versions with additional specialized equipment:
  "Sova-1" – with R-130M radio set, an AZI frame antenna, and a telescopic mast.
  "Sova-2" – with R-143 "Lira" radioset.
  "Sova-3" – with PSNR-5K (1RL-133) battlefield surveillance radar.
  R-80 – artillery forward observer vehicle with observation devices.
  BMP-23 (bojna mashina na pekhotata) – infantry fighting vehicle with 23 mm gun 2A14 and ATGM 9K11 "Malyutka" in a 2-man turret. The chassis is based on the one from the MT-LB but with components of the 2S1 and fitted with a 315 hp engine.
  BMP-23D – improved version with 9K111 "Fagot" and smoke grenade launchers.
  BRM-23 – reconnaissance version. Prototype.
  BMP-30 – similar chassis as the BMP-23 but with the complete turret of the Soviet-made BMP-2. Only 10 built.
caption: Ex-East German MT-LB used by US Marines in the OPFOR role.
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