Grip thickness (If this helps)
My mini vert is at .730" raw
Intelli anodized is .740"
Intelli chrome plated is .750"
Im gonna do more checking tomorrow to check wall thickness on a m86 if its been modded.
Just to put some tension to rest, I pulled up my Intelli file, it looks like it won't be a problem at all. It will require machining and a mounting tab.