This artist or illustrator isn't very good and we can see they are a hired hand with a medium drive or experience at first impact.
The first laser guns in the comic were normal guns, beretta, glock, but the bullets were for some reason beams, I noticed that soon and was happy when they changed the stuff in actually scifi gear(probably because chinese readers said how dumb it was), pity that now we discovered they ripped off the new weapons from games because they coulnd't come up with a original design or bother to modify the original, some proportions are even weird how the translator made notice in chapter 35.
But if the story is good we can ignore that, is the illustrator problem when they come to him with a copyright paper.