Well, as far as stats go... I'd do Shuriken damage/AP, maybe with a Rating to the launcher to represent the Strength for range and increase to damage. Accuracy 4 or so, (c) or (m) for the ammunition, probably 10-20 rounds max. Slap on a Capacity so people can put it in their cyberarms!
EDIT: Use the Pistols skill, as that's basically what it is. The relatively lower Accuracy comes from that.