K21

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K21
K21 on combat firing practice
Type	Infantry fighting vehicle
Place of origin	South Korea
Service history
In service	2009–present
Production history
Designer	Agency for Defense Development
Designed	1999–2008
Manufacturer	Hanwha Defense (originally Daewoo Heavy Industries, later renamed as Doosan DST, follow by Hanwha Defense Systems)
Unit cost	$3.2 million
Produced	2009–present
No. built	466[1]
Specifications
Mass	25.6 t (25.2 long tons; 28.2 short tons)
Length	6.9 m (23 ft)
Width	3.4 m (11 ft)
Height	2.6 m (8.5 ft)
Crew	3 crew + 9 passengers
Armor	2519 aluminium alloy chassis. Layers consisting of S2 glass fiber reinforced Al2O3 ceramic armour All round protection against 14.5×114mm API projectiles as well as 20 mm FSP Frontal armour is resistant to 30 mm APDS rounds fired from a 2A72 autocannon (standard on BMP-3 turrets) Roof armour is resistant to 155 mm artillery shell fragments Soft- and hard-kill anti-missile defense systems, ERA, NERA (only for the K21 PIP)
Main armament	SNT Dynamics K40 40 mm autocannon (240 rounds)[2] Two Raybolt ATGM launchers (planned)
Secondary armament	7.62 mm M60 GPMG
Engine	Doosan- D2840LXE diesel 750 hp (840 hp for the PIP)
Power/weight	29.2 hp/tonne
Suspension	Passive in-arm suspension unit (ISU)
Operational range	500 km (310 mi)
Maximum speed	70 km/h (43 mph) (road) 40 km/h (25 mph) (cross-country) 7 km/h (4.3 mph; 3.8 kn) (water)

The K21 is a South Korean infantry fighting vehicle. A replacement for the K200-series, it was formerly designated as K300 or XK21 KNIFV (Korea Next-generation Infantry Fighting Vehicle). The initial production began in 2009, with the Republic of Korea Army planning to field approximately 466 units. It is designed to effectively defeat other IFVs as heavily armed and armored as the BMP-3.^[3]