We recommend using purple Loctite due to our extensive experience with screw extractions. Commonly, we encounter blue and red Loctite, so if you opt for blue, use it sparingly—just a little on the threads.
For securing the optic to the plate and the plate to the slide, apply a dab of Loctite towards the front and back of the plate, between the slide and the plate. This helps isolate the plate. Additionally, put a dab of Loctite under the optic where the bosses are to isolate the optic on the plate. Finally, add a touch under the head of the screw where it interfaces with the optic. Please note that this approach increases the likelihood of breaking or stripping screws when removing them, but it is effective.
