Keltec RDB Side Rail

thingiverse

Here's a quick fix for the Keltec RDB: a makeshift side rail that gets the job done. You'll need to swap out the stock screws with longer ones, M3x20 is a good bet. The included left and right side rails will give you access to the takedown pin, and there's also an optional universal model that's stronger but less versatile. Just be aware: if you remove this makeshift rail after installation, those screw pillars are going to snap under the strain, so plan accordingly.