Home Defense
The gold standard is a firearm that is dependable(read pump or revolver).
Accessable,swings and fires quickly, covers target easily with a large margin for error(panic situation). Handgun is more accessable and handles easier than shotgun. There are two drawbacks to a revolver 1. If loved ones are in other parts of home highpower projectiles can pentrate walls
2. requires precise targeting.
Shotgun is a little less accessable however a properly configured weapon easily stores and swings.
Therefore a Pump shotgun with large magazine capacity and a wide pattern is the smart choice.
Barrel should be as short as legally possable and overall length at Federal minimum length. Guage should be 12ga for adult males and 20gauge for Ladies.
The make of the gun should be the highest quality gun that one can get, after all it is for protection.Money is not the issue.
Some thought on which to purchase depends on if the weapon will also be used for other purposes. If going to be used for hunting, it is essential that the weapon is a take down model for barrel interchangability.And as such should be a modern weapon not grandpa's cut down.
A matte finish is recommended to reduce any glare that may reflect and indicate your position within your home.
Choke selection should provide for maximum pattern and 20 feet.
Shell Shot selection should be very large for penetration. I load two 00 shells follwed by two slugs, (slugs for wall or vehicle pentration).
Therefore a Remington 870, Mossberg 500 are fine. The Winchesters 1200 and 1300 are ok, a little lighter but under extended use may not be as robust.
A thumb safety is great as it speeds shooting as well.
A Winchester old Model 12 with a short barrel is my choice ,it shoots faster as the trigger can remain pulled and shoots as fast as one can pump.Great magazine capacity and stock at comb fits well and easily covers target.
In addition the gun is well built and can be used as a club in event that the action gets close.
Whatever the choice it is serious and simply the weapon needs to function, feel comfortable have ample killing power(not wounding) and one must have total confidence in it and be expert in its use.