People don't complain about those guns because they have them and most players are selfish and don't want their guns changed even if it benefits the game as a whole because all they care about is how easy they have it to be able to kill other people as quickly as possible with as little effort
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Except no changes listed are anything near that high. The highest change is 0.06 in the bar. Not 0.3 as you have provided as your example