Word to the unwise. Picked up a set of Tritium sights for my Ruger KP345PR and tried to install myself. Instructions said to just pop old ones off and drive new ones on. Front went on ok with just a little filing but I had no idea that the base of the rear sight held springs and the plunger in. By the time I realized, I had already damaged the spring and broke the plunger. Now my gun is at the smith's and I'm having to wait 3 weeks for parts to come and get it back. Costly mistake on my part! At least I have the GP's to play with till I get it back.