The magnet in the frame shouldn't be epoxied. It is probably just corroded and expanded causing it to be extra tight. Try putting a dab of epoxy on the end of an allen wrench and gluing it to the top of the magnet. You should be able to pull it out. If it doesn't come, all that will happen is that you will pull the finish off the magnet. You can then break the magnet up and dig it out and clean up the area.
The one in the trigger is definately epoxied in. The magnets are rather soft. You can probably dig it out with an awl.
Except for the Automag in front, its usually the man behind the equipment that counts.