[Groombug]

I had the Zenith tac grip, not that model, but the same design. I liked it. It was fatter in the palm and allowed for a more ergonomic grip. The metal inserts for the motor plate screws is great, just remember to screw the screws in properly and not strip the threading.

I have no experience with King Arms grips. However, if the quality and finish is anything like their scope mounts, then there should be no problem.