Contact SA and have them send you a new BUIS. That should be an easy fix for them.
If you’re going to actually use those sights then you may want to consider a higher quality BUIS than the ones that come with the Saint.
This would be nice.... we'll see.
https://www.breitbart.com/politics/2025/06/17/rep-andrew-clyde-senate-version-of-one-big-beautiful-bill-removes-regs-on-suppressors-short-barreled-rifles/