Do you have aftermarket aluminum handguards, and have you bent the
mounting screws, or distorted the hex sockets? Replace them with these
grade 10.9 Metric Blue screws. You get two each of M8x30 and M8x60 or M8x70. The shorter
screws fit "slash-cut" inserts, and the longer ones fit expanding-type inserts.
Measure your screws to see which ones you need. (Flathead screw length includes the head.)