It seems insignificant but if you look at the numbers in the grand scheme of things it makes a little more sense. You've gotta keep in mind the pulse rifle nerf as well as the AR buff. Granted, a 0.04% increase is almost not worth doing, but when it's compared to a 14% nerf it's going to make that weapon considerable more viable in firefights. You can't JUST look at the numbers on auto rifles and complain about how low the damage buff is when this is a rework of the entire meta. The pulse rifle nerf makes the AR significantly more prominent in the current meta