Question regarding Glocks

[elmrich]

I'm thinking about buying a used Glock 22 with factory night sights. I was wondering do the night sights dim over time or do they remain bright for the life of the pistol?

 

[DPris]

Tritium night sights are generally rated at a 10-year lifetime.
Some dim sooner, others later. They do not run indefinitely.
Denis

 

[denfoote]

Tritium has a half life of 12 years!!
That means in 12 years, your Trijicons will be half as bright as they were when you bought them, hence the 10 year guarantee.

http://www.physics.isu.edu/radinf/tritium.htm

 

[Zekewolf]

I believe most of the night sight manufacturers now guarantee their sights for at least 12 years.