I have Williams FO sights on my Kahr P40 and TFOs on my MP 9 and Kimber 1911. The FO element needed replacing on the P40 recently after a couple years of hard use in training classes and the tritium element started coming out of the casing on the TFO front sight on the 1911 after running the gun hard for a few months(sights are 2 years old). I love the brightness of the FO sights but if you run your guns hard, they just don't hold up as well as I would like. SO my 2 cents: If you run your guns( lots of rounds from holster drills, run and gun type work ect., understand that FOP sights are a maintenance item. If that is an issue, then stay away from em. I am on the fence with em.
Hope it helps others on the board.
Hope it helps others on the board.
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