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Heckler & Koch HK21
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Approved claims
Length1.021
Length1.03
Length1.14
Barrel length0.45
Barrel length0.56
Barrel length0.9
Rate of fire900
Rate of fire800
Rate of fire750
Rate of fire450
Muzzle velocity800
Muzzle velocity840
Muzzle velocity910
Muzzle velocity915
Published range0.1–1.2
