This particular shotgun has an extension after where the magazine cap would be. Turning the magazine cap (or the analogous part) seems to have the effect of adjusting the shell capacity of the weapon, from four in the tube to six. However, it's an absolute bear to turn, and I discovered that by accident. I don't have much experience with shotguns. Is this normal behavior, and is it normally so hard to turn if it is supposed to do that?
