Crits give a +25% damage multiplier, whereas the "Blunted Criticals" effect (to find for example on pistol) gives a -25% damage multiplier to crits. However, 1.25 ist not the inverse of 0.75 (0.75!=1/1.25), which means that criticals do less damage than normal hits with such a weapon. I suspect that a multiplier of 1 / 1.25 = 0.8 (-20%) was intended so that crits do the same damage as hits.