AK-Gold Or M4-Gold

I've got a pretty decent aim with both guns. I can control the recoil on both guns (if I spray, burst/singleshot/doubletap doesn't really have an effect on me). So, I'm just left wondering: which gun should I get? The AK-g or M4-g?
Comments saying why and why not to like either guns and the uses of each would be greatly appreaciated.
«1

Comments