but am having difficulty cleaning the crud off the front of the breech plug. Because of it being concave (?), what do you use to get in there to clean it.
Dog, I myself Soak my Plug in Very Hot Water, to which ive added a Touch of dawn Dish Detergent. I let it Soak, while I commence Cleaning the Barrel and Action, Bolt and Bolt Carrier, and then use a Tooth Brush, and some Pipe Cleaners, to finnish off the Plug.