Idk what it’s is. Heavy Machine Gun or Sniper maybe? Or the Dark Saber from The Mandalorian
BFG
Big fucking gun
50 caliber
Bfg 50
Or a barret 5o cal
Or if you’re talking doom eternal
The bfg 9000
But if you’re talking real life it would probably be a GAU-8 Avenger
Idk what it’s is. Heavy Machine Gun or Sniper maybe? Or the Dark Saber from The Mandalorian