Since the JPoints don't ship with mounting screws and the MOS plates don't account specifically for the JPoint anyway, I thought I'd share what I did to make it work (I searched and couldn't find the info before I figured it out). MOS plate #4 (Leupold DeltaPoint) + an M4 x 8mm socket cap screw ground down to about 7mm with a file or sandpaper will do the trick. An M4 x 7mm socket cap would work as well I suppose but most hardware stores seem to not carry those. M4 x 6mm is too short (it will hook up but you only get a small amount of thread contact and it's better IMHO to go with an 8mm length and grind it down some). I got mine from Home Depot but Lowes should have them as well. Cost me 65 cents for both screws and about 10 minutes of my time with a file grinding them both down. Just thought I'd share. Good luck. It's a pretty solid setup.