The effects were more around the whole gun. now it's just the scope
Looked into that a bit, especially our old reports and conversations around it, and it might actually be an odd situation where that was a bug and the effects weren't supposed to be that extensive. We are going to try to push that one back up as a new bug though.
Also, could you confirm that this is the issue, as seen in this old thread: https://www.reddit.com/r/CallOfDutyMobile/comments/m1u03f/dlq_33_holidays_bugged_there_is_a_change_in_the/