The pic of the HMG he posted isnt a DShK... rather Chinese (HIT produced) HMG variant... likely:
http://world.guns.ru/machine/ch/type-5-hmg-e.html
A levi-cop with the HMG:
View attachment 354604
Caliber: 12,7x108mm (also 12,7x99mm / .50BMG in W95 version)
Weight: 24 kg (gun) + 17,5 (tripod)
Length: 2150 mm
Length of barrel: 1000 mm
Feeding: belt, 60 rounds
Rate of fire: 650-700 rounds per minute
...
DSHK:
Caliber: 12,7x109 mm
Weight: 34 kg MG body, 157 kg on universal wheeled mount with shield
Length: 1625 mm
Length of barrel: 1070 mm
Feeding: belt 50 rounds
Rate of fire: 600 rounds/min
,,,,,,,,,
M2:
Caliber: .50BMG (12,7x99mm)
Weight:38 kg MG, 58 kg complete with M3 tripod
Length: 1650 mm
Length of barrel: 1140 mm
Feeding: belt
Rateof fire: 450-600 rounds/min