I believe it to be removable, and if loctite is the case just hope it isn't a strong one like red. Use a strap wrench to remove the feed tube. If it doesn't come off with a strap wrench, it's just not going to come off, leastwise not in any fashion you'll want it to, like distorting the body, stripping the threads, or snapping in two. Be sure of course that if you do have a loctite solvent that you plan to employ, take the breach off the gun before applying! I can't imagine something that can dissolve loctite would be good at all for your gun internals.