What is the preferred strength of Loctite for the Glock front sight screw? I just installed my Trijicon Bright and Tough™ front using medium strength (blue) Loctite, though some sources indicate the stronger red Loctite is a better choice. I always considered the red to be "permanent". What say the Glock folks? Thanks!

Purple is good stuff. Read the specs and recommended uses to see if its what you want.

I use blue although purple might suffice.

I've have used blue coming loose so I only use red loctite on Glocks now. There is not much screw depth so I want it to stay.

I use Red on the fronts. I lost a tritium front once installed by a gunsmith, so now Red only. Easy to put heat on that little screw if you ever have to remove it.

I typically use blue loctite 248 (less messy); though back in the early 80's I used red loctite on the front sight of my Ruger Gov't Model .22 and it's been like that until I decided I needed a fiber optic front sight due to my aging eyes.

I took the barrel and placed it in my freezer overnight, next day I took a brass punch and tapped the screw head a few times and that broke the 30+ year old seal allowing me to update the front sight

I use red. I've never had a problem removing them with the Glock front sight nut driver.