Good stuff
Nothing wrong with loctite, just use the correct grade. That would be purple for most all gun screws.
The key with Loctite is clean. Degrease the screws, degrease the threaded holes.
Loctite typically fails due to oil or grease in the threads. Loctite primer is available to clean prior to application.
If you accidentally use red, heat is your friend. Blue can sometimes be difficult, again heat is the answer.