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The HK437 in calibre .300 Blackout is another building block of the modular HK433 multi-calibre platform. The special weapon with automatic capability has been designed primarily for use in medium-range tactical applications by special military and police forces who utilise the most compact weapons to achieve the maximum effect on the target.
Caliber: 300 BLK (7.62 mm x 35)
Operating principle: indirect gas-operated – short stroke piston
Bolt system: Locked rotating bolt head
Feed mechanism: Magazine
Modes of fire: Single fire or single fire / sustained fire
Trigger pull: 25 – 35 N
Rate of fire: 850 rounds/min
Barrel profile/Twist: Groove/land profile with 4 grooves, 8″/203 mm right-hand twist
Magazine capacity: 30 rounds
Safety/fire selector lever travel: 45°
