From what I've seen it uses a grip frame that's very similar to the oirignal Cobra and DSII models. It's not quite a round butt, but it's very short. My guess is that now that the guns are in the wild it won't take long for aftermarket grips to start showing up. Colt already showed off what looked like VZ grips on some of the pre-production models, but I have not seen those available anywhere.