[Give Piece A Chance]

Benelli M1/M3 or the Beretta equivalent, alternating 2 rounds of buck (any size will do; I prefer #4) followed by a slug. Use the Federal tactical buck and reduced-velocity/recoil slugs available from either Federal or Remington. Birdshot lacks the stopping power you may need against a heavily clothed intruder, and magnum loads are overpowered and reduce your magazine capacity.

A light mounted on the shotty is also very helpful if you are properly trained in its use. A tactical sling like the Giles is also a must-have.

[Chop Farwood]

Many factors need to be considered as to what works best in your environment. Building layout, construction, proximity of neighbors, etc. A good place to start researching this topic can be found at... Firearms Tactical And investing in competent, professional training is worth considering. The defensive shotgun courses I've attended really opened my eyes to many things I would have never considered on my own.

[lugsoul]

The cheap little fiber optic sights are pretty good, too.

[Shooter 2.5]

Be mindful that lights, like tracers, work both ways. My son uses low power LED’s for nightlights. You can always toss the flashlight down the hall.