I'm getting old and I don't see the front sight as well as I used to so I'm experimenting with various optics. I've got CT grips on my snubby, a Streamlight/laser on my XD and have just put a Fastfire II on my Sig 226. I had a good result my first day at the range. The following target was shot at 50 feet with a 226. I'm interested, of course in the longevity of the sight. Anybody own a Fastfire?