As I first read this, I started off thinking 'this is exactly my intuition'! Then I thought 'wait....all my guns are made out of polymer and it's what is ultimately responsible for holding the heavy-ass slide on the gun.'
I imagine this is what everybody thought about polymer use in pistol frames to begin with. Perhaps the correct polymer application may be equally as useful for mounting the relatively lighter-weight RDS to the slide? I'm glad someone is working to find out.
For the record, I'm not trying to be critical, or dickish, I just thought it was quite humorous how my mind tried to wrap itself around this concept. Was trying to convey light-hearted tone and not sarcasm.