Based on MicahGanske's grips (version 3). He devised an excellent shape that clips on to the ally and is comfortable on the front, but his grips were too big for my hands to sit comfortably. I have sculpted them in blender for a much slimmer profile, which works better for my hands.
The author remixed this model.
Sculpted to make the overall exterior of the back and side of the grip smaller/slimmer.