In several common FPS shooting games, machine guns are not considered to have very high killing power, but that's because of modifications needed for game balance.
In reality, machine gun rounds of 12.7mm have enough penetration power to go through about one-inch-thick steel plates, over ten centimeters of brick walls, and even dozens of centimeters of sandbags within a kilometer range.
Cover that's not thick enough can hardly stop a large-caliber machine gun, a graze would wound, a hit would kill.
Though the gun is fierce, it also demands more from its user.
Javell excitedly rushed up, and then within three seconds, came back with a literal face full of dust.
His Strength was simply not enough to control the heavy machine gun; he almost only played a role in pulling the trigger, as the gun body violently shook due to the recoil, kicking up a lot of dust.