RDS Keeps Getting Loose

1
I have installed an RDS on my S&W TRR8. After a few hundred rounds, it loosens to the point where it forms a small amount of forward/backward play on the rail. And, yes, I have used Blue Loctite on the clamp screw. Looks like all that does is delay the loosening.
Does anyone have a more permanent fix for this? One that still allows me to remove my RDS when I want to?

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