@Scoutbob
I have the FDE magpul grip on mine and I love the way it feels in my hand. It also matches my handguard. I say go with the grey grip. Magpul makes good stuff brother.
I suggest something like the BCM Gunfighter series or the K2, for the grip angle. The extreme angle/rake so many grips have is just murder on my wrist and seems like an ergonomically and objectively inferior setup.
But if you mostly or entirely shoot from the bench or proned out it’s not as much of an issue as it is if you shoot standing or walking or carry the rifle in a low ready/slung in front position.
The first day I took a carbine class and had the rifle in front of me with my hand on the grip for hours, I threw out all of my angled grips in favor of the much more vertical stuff
Dremel will reshape the high tech plastic to a more comfortable and “custom” grip. Cheap way to deal with it. And worse comes to worse you were planning on a new grip anyways. Try it you are out nothing
I’ve kind of adopted the Mag Pul K2+ as my standard go to grip. It is more vertical than a standard GI and works well on pistol platforms as well as belly guns. Granted I have ape arms and meat hooks for hands so YRMV. I have the finger groove type one pictured above from a different mfgr on my AR-10B but never found it very comfortable even after I took the “shelf” off it.
I as a sucker for all things B4 or SOPMOD as far as a stock goes, ESPECIALLY with optics.