Shotgun Barrel

[SF_VOL]

My brother in law sent me an e-mail with a couple questions about shotgun barrels. He's got an .870 and is looking into buying a short barrel for home defense. Here are his direct questions and comments:

1. Why would I want rifled sights instead of a bead sight? (much harder to find rifled sights on an 18.5" barrel)
2. Would there be any reason for me to get 'Breacher Barrel'?? (see pics) I know they are designed for 'entry breaching', but curious about home use for this barrel.

I've never used rifle sights on a shotgun. I always thought that was the beauty of a shotgun in close quarters...just point and shoot. But the answer to question 1 is pretty straight forward I guess...if you have the time to aim you have a better chance of hitting your target where you want. I really don't see the necessity or the point of having a "breacher barrel" for close quarters home security either. Maybe some of you have some other thoughts.

Any insight or opinions from you gun gurus?