I did a little bit of testing and i found out that armor charges especially the one on the legs don't do anything, they are supposed to give you "stat" bonus when you have charge but with 3 weapons surges im doing the same damage as whithout, so what's the point in those mods if the effects doesn't work ????
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I never did the test but I’d be surprised surge mods do nothing given how long people have been using them, unless it’s a recent bug.