I have one of those Brownell's thin blade sets.
They almost fit lots of things. Almost.
I never understood WHY gunmakers have to use such narrow slots. Even custom made 'turnscrews' are subject to breakage, and the screw is almost always damaged.
Perhaps it keeps them in business making replacement screws ("pins"). Or... it's designed as an obstacle to keep the idiot customer out of his gun.
How cool would it be to have a great quality gun built with Torx fasteners?
The best you can do is to carefully grind your own screwdriver.
Go slow, so as not to burn the hardness out of the steel.
Start with a good one. This is no place for chinese crap.
