The grips are standard AR grips, so you can change to anyone you desire. The grip angle is steeper, the grip block that the grip attaches to was designed to place the front strap of the grip at the same angle as the McMillan A series stocks. This was a request from some SF snipers after the first batch had the conventional grip angle of the AR rifles. I've always respected the requests of guys who use our stuff in the field. ;-)
Thanks for the response Steve! Good to hear a bit of a background on that.
I have no doubt as to the functionality of it, I know you guys get your stuff used and tested by some of the most respected snipers in the world.
I guess if I was to get the chassis I would replace the grip with something like this (after removing that "beavertail"):

Again thanks for the response, and keep building awesome Canadian rifles!