Its a bit fatter grip with a bit more distance to trigger than the vert grip xrs. Its not as fat as the bravo though to me. And you can whittle it down if you trust your wood working skills.
As far as the chassis as a whole, its much more comp driven to me than the xrs which is what I assume you are after talking about foundations and all. I might be able to get my xrs up to 20lb if I filled it with weights vs the 17 its at now with internal one set of sides and a proof comp contour. My xylo will get to 27 or so. And then I make my xrs fat with a long heavy barrel it has some harmonic resonation when on concrete that I see through the scope, didnt happen with my shorter lighter 223 in it though. If I slap mdt weights on the outside of the xrs the rrs bipod knob interferes with them and cant be turned and just barely drag but still will pass under if you have it rotated juuuust right.
The xylo is in another world though when the machining quality and feel comes into it compared to the xrs which is a budget chassis with plastic slapped on the side to hide the crude.