Red dots are quite easy to install if you have some basic knowledge of tools and have the right screw drivers needed. Remove the cover plate with an Allen wrench. Hopefully they included the proper screws for the red dot. I believe they are 6/32, 3/8 of an inch long. Position the optic on the slide. Put some blue Locktight on the screws and screw them in. Torque them to 15 inch pounds if you have a torque driver. I would let the locktight dry overnight. If you don't have any of those tools you may want to have a gunsmith or armorer mount the dot for you.
Considering that Glock and Smith & Wesson use thread locker on their optics cover plate screws, Holosun and Swamp Fox ship their optics with thread locker on their screws, and CH Precision ships their adapter plates with thread locker for their screws, they all must think it is an important step in the installation of an optic on a pistol. I would error on the side of the manufacturer's recommendation as it relates to thread locker.
That’s because they know most of the people installing them aren’t the most mechanically inclined, and it’s a lot easier to just do that instead of explaining the correct process and expecting people to get it right.
Do what you want brother, but having had this discussion with several gunsmiths and a Boeing engineer, I err on the side of if it needs LocTite to stay tight then the threads or the pitch is wrong or the screws are inferior.
Most average gun owners don’t own or utilize a torque driver. Mostly they use Loctite and torque it by feel. Which is great until you find yourself trying to drill out or EZ out a tiny screw in your $500 optic on your $900 pistol because you snapped 7 T-10 bits already trying to get it off. Pro tip. Use an actual hardened Torx driver. And make sure it fits properly. If you snap the head off a screw or strip it out you got a problem.