Don’t Get Caught Without It!
If your firearm has any type of screw that can be removed (on grips, backup iron sights, optics & mounts, weapons lights, etc.) then you must use Loctite threadlocker.
Over the years I have witnessed shooters at the range suffer as their shot groups got bigger and bigger, and only after many expensive and frustrating rounds later realize that their optics was no longer firmly mounted on the weapon. Over time the weapon’s recoil had loosened the screws of the mounts to the point that the scope could no longer hold zero. I have also seen many accessories such as backup iron sights (BUIS), grips, rails, light, and lasers start to wiggle loose. There is a simple and inexpensive solution to this problem. Loctite Threadlocker.
Whenever you add accessories to a firearm that involve screws you should always be sure to use a dot of Loctite “Blue 242” threadlocker on the threads of the screws. If you don’t then the screws will eventually start to wiggle loose over time. Don’t even bother mounting an item on a firearm if you aren’t going to Loctite the threads. It won’t stay on.
There are two kinds of Loctite. BE SURE THAT YOU ARE USING THE SEMI-PERMANENT (“BLUE”) AND NOT THE PERMANENT KIND (“RED”).
“Blue” (242) is the semi-permanent kind. Even though it says “Blue” it comes in a red tube (as seen above in the photo of the packaging). This is what you want. A dot on the screw’s threads (like the photo on the packaging) will keep the screws from backing out of the attached item during the repeated abuse that a high-caliber firearm can dish out, but you will still be able to remove it when you want to.
“Red” (272) Loctite is the permanent kind. DO NOT BUY THIS. TO RELEASE IT YOU USUALLY HAVE TO HEAT THE SET SCREW WITH A TORCH. You are guaranteed to damage or destroy the part that you are trying to remove.
Loctite can be purchased at Home Depot, Lowe’s, and other home improvement stores, and is usually located with glues and adhesives.