DR, right now, is too high, I think. DR 1 is more appropriate — this baby would stop pistol bullets well, and stifle rifle bullets down enough to probably eliminate their lethality (but still cause penetrating injuries), and the coating obviously stops a shot or two from an energy weapon. But it's not DR 3 — that would stop pistol and rifle bullets easily, in the same place, multiple times, and would stop energy shots as well.
Maybe, if it's to be a duty jacket as well, have room to install an armor plate in the back to boost it up? Like a motorcycle jacket?