If you do considerable hunting with a shotgun in localities where the use of a plug is prescribed by law to limit the number of shells carried in the gun, you'll find a plug like the one shown easy to insert and remove. It is inserted from the cartridge-loading end instead of the usual way of inserting a plug from the muzzle end of the magazine. Instead of a plain length of dowel, the closed end of the cartridge carrier inside the magazine is bored out and fitted with a brass cap. This is threaded to screw inside a brass sleeve, which is a drive fit inside the cartridge carrier. The cap is bored and threaded so that the plug can be screwed into it. Then the cartridge carrier with its brass cap is replaced in the magazine. Now, when it is necessary to use the plug, “break” the gun, remove the brass cap, insert the plug and reassemble. In this way, the plug cannot slide back and forth inside the magazine when the latter contains less than three shells.