Had a briley thin wall choke rusted in an old bps I had. I soaked it muzzle down in kroil for a couple days and that sucker still wouldn’t budge and I wound up stripping out the slots for the choke wrench. Ended up having to heat it up with a heat gun and use a large ez out to get it out. It messed up the choke but the barrel was fine. I’d try an oil soak first and maybe some heat.
