I have tried Houge,Ergo, and Magpul Moe+.Got the Jpeg from LaRue for AR10 [there designation] for RRA .308 and fit for hand was perfect.Leaves tip of finger for trigger.They have a rough and smooth type.It's a hard plastic.The Moe+ left a gap. Found when I had them next to each other the horizontal straight had to be made longer to eliminate the gap.Can't remember where I saw it but dementionally the Jpeg was one of the largest.MagPul Moes on my 15's.