Loader,
Doubles are the way to go for non or limited experience shooters for defence shotguns, since they remove nearly all the functions that repeaters require. Manual safety, rather than auto safety, would be preferrerable and store open and loaded. The neophyte then can see that it is loaded, and knows open is safe closed is ready. An untrained shooter will either solve their problem with the two shots available or be in more trouble than they can solve so additional rounds matter little.
Fireplug
Doubles are the way to go for non or limited experience shooters for defence shotguns, since they remove nearly all the functions that repeaters require. Manual safety, rather than auto safety, would be preferrerable and store open and loaded. The neophyte then can see that it is loaded, and knows open is safe closed is ready. An untrained shooter will either solve their problem with the two shots available or be in more trouble than they can solve so additional rounds matter little.
Fireplug