Products Subject to This Safety Bulletin
Potentially affected pistols include any Ruger-57 pistol with a serial number of 642-26274 or lower (including all Ruger-57 pistols with a “641” prefix). If your Ruger-57 pistol is within this range (641-00000 to 642-26274), you should follow the inspection procedure outlined below to determine whether your pistol requires a retrofit. Ruger-57 pistols with a serial number of 642-26275 and above are not affected by this Safety Bulletin.
Description of the Issue
In some rare instances, the internal “leg” of the right safety lever may crack or break, rendering the manual safety ineffective. If present, this condition may cause the manual safety to appear to be functioning properly when it is not. Although Ruger already instructs owners of Ruger-57 pistols to perform a function check before each use, we are requesting that all owners of potentially affected pistols perform this safety inspection immediately.
Read the rest of the advisory: https://ruger.com/dataProcess/ruger57retrofit/?r=y