Hi im kinda new here in the forums, been just a lurker for the past weeks. anyway I wanted to change my 3 dot sight config however the rear allen screws ( watch out pun coming up) screws the hell out of me. I have tried using a soldering iron, a pocket torch to loosen it up but to no avail it still wont budge. Any advice is greatly appreciated. P.S. i don't have a dremel tool so grinding it off isnt a good idea and no I cannot bring it the to gunsmith since we have a long pointless Election related GUN BAN here in the Philippines.