RE: Problem with Thomson center
We have a TC Renegade and a Hawken. TC made special fittings to fit over the breach plug and remove them. It takes a pretty good wrench on some of them, but they are made to fit and do not damage to the plug. Have used them on both my Renegade and a couple of Hawkens. I am not sure if this item is still available, but they were back in the days I got mine.