Well the MK I is a derivated under licence of the French HS.404. The number must be no very different:
HS.404
Cartridge 20 x 110
Proj weight 130 gr
Rate of fire 700 rpm
Muzzle velocity 880 M/S
Gun weight 60 kg
Q(kW/Kg) 9.8
M(1/s) 25.3
Fed 60 rounds/drum
Shells HE or HEI
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