Group : Wheeled Armored Vehicles
Status : Active
Also Known As : BREM-4K, BRM-4K, BSEM-4K, BTR-4K, BTR-4KSh, MOP-4K
Origin : Ukraine
Contractor : KMDB
Initial Operational Capability (IOC) : 2007
Total Production : 470

The BTR-4 is a fully amphibious, 25-ton class, 8x8 all-terrain, multi-purpose wheeled armored vehicle designed by Kharkiv Morozov Machine Building Design Bureau (KMDB) for battlefield troops transport and to provide fire support to dismounted troops. The BTR-4 medium-armored vehicle is well suited for rapid reaction forces and marine corps carrying up to fully equipped infantrymen/marines in addition to the three-man crew. It has been designed to operate on road and cross country in extreme climates and adverse weather at day/night with temperatures ranging from -40 to +55 Celsius.

The BTR-4 hull consists of three compartments: front compartment is the driving station; middle compartment contains the vehicle's powerplant; and rear compartment which acts as the troops and fighting compartment. The basic version featuring ballistic protection against medium-caliber firearms weighs 17.5 tons. The version fitted with add-on armor, thus providing the highest level of protection, weights around 25-ton. It can be powered by either 3TD 2-stroke diesel or DEUTZ 4-stroke diesel engines both developing 500-hp (or 600-hp). During amphibious operations it is powered by waterjets.

The basic BTR-4 can be equipped with the GROM, Shkval or BAU 23x4 weapon stations. GROM includes a 30mm gun with 360 rounds, a 30mm grenade launcher with 150 rounds, a 7.62mm machine gun with 1,200 rounds and four Konkurs or Baryer anti-tank missiles. Shkval module consists of a 30mm gun with 360 rounds, 30mm grenade launcher with 150 rounds, a 7.62mm machine gun with 2,000 rounds and two Konkurs or Baryer anti-tank missiles. The BAU 23x2 includes two 23mm automatic guns with 400 rounds and one 7.62mm machine gun with 2,000 rounds.

KMDB is developing several versions derived from the BTR-4 Armored Personnel Carrier (APC). The BTR-4K is a command vehicle featuring a 7-man crew, communications equipment and a combat weight of 20t; BRM-4K is a reconnaissance vehicle featuring six-man crew, communications and reconnaissance equipment and combat weight of 20.7t; BREM-4K is a four-man, 19t repair and recovery vehicle equipped with crane, winch, etc; BTR-4KSh is a command and staff vehicle featuring a combat weight of 18t, communications equipment and a 7-man crew; BSEM-4K is an 18.6t ambulance; MOP-4K is a 21t fire support vehicle fitted with a 120mm gun and 40 rounds.