Thumb screw help on AICS

Desert Thumper

Private
Full Member
Minuteman
Jun 30, 2010
4
0
55
So Cal
Hey guys, I'm installing thumb screws on the cheek rest of a AICS stock. Problem is they are not screwing down all the way to keep the rest tight. Seems like the threads are not long enough before they stop at the chassis and I don't want to keep tightening them down for fear of stripping. Anyone have this problem?