At close range it's completely OP. Just saw a guy on crash site running around like a mad man not aiming down sites, nothing...just spamming that thing. No weapon should be able to be abused like that.
I don't think the Jackal is too OP. I just think that the range needs to be lowered a bit on it because i was playing on hells kitchen and got killed on the ground from someone on the fallen tower in the middle of the map.