Doesn't seem like it was done on purpose since he was shooting with the normal fire rate.

this bug has been known for months and no one has cared enough to fix it you can see he didn't mean / notice it happened and i don't think he should be punished for it.




edit: you can see in the clip he tries to pull out a mini 2 in order to shoot the jet suits due to the fact that dark matter is bugged it doesn't pull out the mini 2 but rather bugs out the dark matter gun