In installed a Novak fiber optic sight onto a steel Colt Commander.
I loved it. It really aided my front sight acquisition as my eyes somehow got older.
One problem that they don't tell you about in the ad copy though. Fiber optic sights in general are more fragile than non-polymer sights.
On my second range session, firing federal FMJ rounds, the left fiber optic rod broke and fell out of the rear Novak sight. I picked it up off the floor and slid it back into place, but the end of it had broken off from the force of the recoil.
Called Novak for a little chat.
Basically Novak said (all) fiber optic sights were more fragile (nature of the beast, being thin polymer rods), and did better with the lower power reloads, where the high impulse recoil stress was not as significant.
(I asked them why they didn't have that little gem on their website. They didn't have a real succinct answer...)
Anyway, I bought some epoxy and cemented the rod back into the rear sight. I haven't gone back to the range with this pistol yet, so will give you an update later this month.
Be advised. The sights work great in that they allow extremely fast front sight acquistion for aging eyes. But they don't appear to like sustained firing of full-power loads, and you may be happier with something a bit more low maintenance.
One guys experience with Novak fiber optic sights on a 1911...
More info here:
http://www.novaksights.com/novak_fiber_optic_sights.htm
http://www.novaksights.com/
Best,
Doc