Look on the back end of your 92FS. You should see what looks like a semi circular piece of metal coming up from the frame. that is the slide retention fix that Baretta came up with. If you take the slide off you will also see a small groove machined on the underside of the slide that the piece of metal rides in. Think I have about 35oo rounds through mine. Only repair done was to replace the firing pin which got cut by the escaping gas when using Rem-Umc yellow box ammo. Frank