Perfect for round handguards and hexagonal.1 slot or bridge 2. 1 screw install - TacFire Gen 2 M-LOK One Slot Handstop

I absolutely love these. Identical to the BAD branded. I have both. One of the narrowest shortest hand stops on the market. Very smooth all over including edges. The screw is toward the back and under the stop has a protrusion that fits into the mlok to keep in place. Anodizing is perfect.: lightweight.