stuck breech plug
I have had a stuck breech plug since 1998 due to removal with slotted tool rounding off the plug ridge on my original Knight Disc.
I got by with careful cleaning and forced air, but recently got a cleaning brush stuck in the barrel near plug. I bought PB Blaster and sprayed down barrel with a toothpick blocking hole and let it sit for 3 days. Then I bought some Kroil. I mounted barrel in a vice with leather to protect barrel, and squirted kroil around plug, then drilled out hole to fit my largest easyout, attached a 7/16 socket with extension and heated with a heat gun, (sort of a higher temp hair dryer used for paint removal) I squirted more Kroil around plug and amazingly after heating the breech plug spun out. I ordered a socket style new plug and anti-seize grease to fit gun from Natchez Supply. good to go! Kroil is the real deal