Blacked-Out Rear Sights are becoming more popular for all applications from military to competition. These rear sights are available for all GLOCK models. I found this excellent article to explain help more about this type of sight here
LumiDot Orange Front Sight $24.99
LumiDot Orange Dot Front Sights are great for dim to brightly lit areas, easy to pick up and quick to acquire. Available for all GLOCK models.
Steel 3 Dot Sights 9mm/40 cal $49.99
Steel 3 Dot Sights 10mm/45 cal $49.99
AmeriGlo Steel 3 Dot Sights are available in plain white and glow-in-the-dark varieties.
Blacked-Out Rear Sights are becoming more popular for all applications from military to competition. These rear sights are available for all GLOCK models. I found this excellent article to explain help more about this type of sight 
LumiDot Orange Dot Front Sights are great for dim to brightly lit areas, easy to pick up and quick to acquire. Available for all GLOCK models.
AmeriGlo Steel 3 Dot Sights are available in plain white and glow-in-the-dark varieties.