Thanks arfyhun, CFS2 sounds do work and I've looked through all the ones in the download section, but didn't find one for this particular gun that suited me. I've used several other cfs2 gun sounds for different guns and am quite happy with them.
For the most part, the stock cfs3 sounds weren't that great, and most have a rate of fire far below what the gun actually puts out. The cfs2 sounds go a long way in fixing that.