Fusion rifles have become obsolete with the exception of a few and the necessity to needing the bonus accuracy hip-fire to have a chance at utilizing them. Because of this, snipers and shotguns have become the dominate choice, the latter of which are now being well over-used.
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People complained about fusions so much that they were nerfed to shit. Try the trials fusion if you have it or roll a new one with hip fire and hot swap