TRUGLO always recommends to have a professional gunsmith perform all sight removal and recommended installation procedures.
Only a screw-type sight installation tool should be used for the rear sight removal and installation.
Front sight installations should always begin using the front sight screw (.100”) that is installed in the front sight. If there is any amount of play in this installation, we have supplied a second, shorter (.080”), marked “Gen4” screw for use, packed inside the header card.
We’d advise to use a little blue Loctite® on the front sight screw threads and red Loctite® on the front sight boss (the stud on the bottom of the front sight that fits into the slide).
If this is a GEN4 GLOCK, we recommend using a little blue Loctite® on the front sight screw threads and green Loctite® on the front sight boss (the stud on the bottom of the from sight that fits into the slide).
Most well-equipped gunsmiths and armorers should have these Loctite products handy. Be sure to firmly seat the front sight into its slide slot by applying steady, gentle pressure. Use a piece of soft wood to press the sight against and do not rap the front sight into place.