The M2 Machine Gun or Browning .50 Caliber Machine gun
Machine gun M2 1-1-

the ma duce

This gun is used by the Machine gun brothers mercinary Fuyuo in a customized version with foregrip and stock but with about 900lbs of recoil you couldnt fire it but it can be caried by some one at about 85lbs empty i would gess that he uses the AN/M2 as it is only 60lbs and fires faster (judgeing by the rate of fire it is most likely an AN/M2)