Being as the flash hider is on a Mini-14....

I would tap the pin out and see if I could twist the flash hider with some gentle wrench application. With only the one pin, removal shouldn't be too hard. Just be gentle. If you want to put it back, apply a little grease before you do. I have a military/police model Mini with an entirely different arrangement at the muzzle. I don't know if Ranch models had pins in the front sights or not.