So my question is, did anyone else have a problem removing these very small screws, and if so what did you do to finally remove them?
These are small Allen Screws with only about 6 fine steel, to steel machine threads holding them, and should unscrew with minimal effort...
___________________________________________I can't answer specifically to your gun, but it is likely those screws may be held in with loctite. Try taking a hair dryer (or heat gun) and heat the area of the receiver next to the screw and see if it helps loosen them up.
BTW, Welcome Aboard!
I tried more CLP, let it sit overnight again, and used a propane torch on the underside of the screws, but they still won't loosen.