As owners of this model know, there is no good option for attaching any kind of light or optic on it. So I called MOM and asked this question: "I have a factory set of Sig Lite night sites. If I have a gunsmith install them what happens to my warranty?" The rest of the gun is covered. If the slide fails and breaks I would have to purchase a new one for $25. The tech also said that it should be durable enough to not fail, but I believe he was just covering his six. I'm thinking I might just go ahead with this option. After all it is my bedside gun.