Ruger has discovered that some Ruger American® Pistols chambered in 9mm may exhibit premature wear of the locking surfaces between the slide and barrel which, if ignored, can result in a crack developing near the ejection port of the slide.
Ruger is committed to safety and is asking owners of Ruger American® Pistols chambered in 9mm to inspect their pistols for excessive wear or cracks and, if necessary, sign up for this retrofit. Details about what to look for and how to sign up for the retrofit appear on our website at [url]Ruger.com/APRetrofit[/url].
Ruger American® Pistols chambered in .45 Auto are NOT subject to this Safety Bulletin. Similarly, other Ruger® pistols chambered in 9mm (for example, SR9®, LC9s®, etc.) are NOT subject to this Safety Bulletin.
I only have a couple thousand rounds through mine, but I guess I'd better check it just to be on the safe side.