A prominent class notice expert has warned a federal judge that the vast majority of the more than 7.5 million gun owners that could be part of a settlement over defective Remington rifles still won’t know about it or be convinced to make claims.

The dire prediction, outlined in an amicus letter on Friday, comes ahead of a Tuesday hearing in which U.S. District Judge Ortrie D. Smith in Kansas City, Missouri, is set to decide whether to approve the settlement, which provides retrofits and refunds to consumers of about a dozen models of Remington rifles that have a defect that makes them accidentally trigger. The settlement does not address lawsuits filed over injuries and deaths.