Same as Westbrook, Great Northern with the small gripper.
You can also get by using your favorite quiver by using a small rectangle (1/4" x 1") of chamois leather wrapped 270 degrees around each MFX shaft where it is forced into the gripper, thereby taking up the difference in space. I'm not one to cobble things to make them work, but this actually works pretty good, however, the leather does fall out when you remove the arrow (but not always). I hunted a whole season this way w/o incident. Never worth screwing around with broadheads though, better to do it right, I prefer a small gripper.
Kris