Probably. The average vampire is unbelievably fast and strong. Arms alone won't cut it, and those arms need to be anchored to something reinforced anyway. At the very least, we're talking muscle enhancement via grafting and bone lacing if you're going to have replacement limbs, simply to support the strain of operating those limbs -- the rest of the body needs to be able to withstand using said limbs.

Apart from that, M4's are current issue in 2014, but Aspida tends to use the next-gen stuff. It's probably working out the final kinks on some sort of usable laser weapon for use as a mounted weapon on a vehicle and some sort of magnetic rail weapon at the time of the RP. For certain, weaponry is definitely on a leap forward in this timeline -- in the case of Aspida agents, they're also probably looking at stuff they can easily conceal or use to saturate the area with firepower.