Also, when ejes says their harder to take apart than an 870, how much harder are they? Because 870s are pretty simple.
They aren't hard really once you've seen it done and know how to do it. The biggest problem is sliding the assembled trigger-guard back into the receiver. You have to separate the right and left cartridge stops and align the hammer pin flats in the slots all at the same time.
Again, in my experience, you
very rarely would need to do this. Just field stripping the barrel off and cleaning everything with solvent down inside as best you can and then oiling is all you need to do. In fact, Browning suggests not going beyond the simple field take down. But for me, being an armorer and working on guns, I am anal about cleaning my guns; so I had to learn how to do it. It was hard to believe, and swallow, that I didn't need to break it down every time.
After doing it for some years now, I am 100 % confident that it doesn't need to be done unless it is broken or you were to physically pack mud inside the action and then work the action. The action is just so simple and basically self cleaning. In other words, don't worry about having to break down the action. So, there you go, another plus. Saves time in cleaning. Using Break-Free CLP is perfect for this type of action.
As far as after market barrels and a mag tube extension, here is what I've seen. After market OEM barrels are not hard to find. They are easily purchased over the internet. They are not cheap, however.
Magazine tube extensions are available, but are not OEM. The are around $80. Problem is that some people feel they work well, others have problems with them. I've been in law enforcement for 20 years now and a firearms instructor and armorer for most of that time. In a home environment, if you have done what you need to do with a 4+1 shotgun, you've got more serious problems. However, if you are really set on a higher capacity magazine, my suggestion is to try to find a BPS "High Capcity" and buy another barrel for it. It is basically a law enforcement shotgun with polymer furniture and a 20 inch cylinder bore barrel. If you don't like black furniture, you can always order some walnut.
There are two versions. One is a 5+1 capacity, and the other is a 7+1 capacity. The stock number for the latter is 012244371.
http://www.browning.com/products/catalog/firearms/itemdetails.asp?cat_id=012&type_id=244&value=011B&cattype=012244&item=012244371
I'm not sure if they are still being made, but there are always new ones listed on Gunbroker. Generally, they are a little cheaper than a regular Hunter model, but the price goes up the few there are out there. I personally don't worry about a high capacity and have the BPS Upland Special with the 22 inch barrel. That barrel length is good for home defense as well as cutting through the woods for squirrel, rabbit or turkey (when I'm not using a bow). I have a longer barrel for dove hunting, etc.
**Remember, be very careful when ordering a new barrel for a BPS. Read the description very carefully. You must match the appropriate barrel to the appropriate chambering; ie. 3 inch to 3 inch, 3.5 inch to 3.5 inch, etc.
Hope this helps you.
, ugly laminate stocks, etc. Not what I'm used to. And I haven't been able to find a Wingmaster, for the life of me, at any shop. I've heard that the Mossie 500s might be a better bet, but I'm looking for something nice, something with some walnut. Has anyone tried out the Browning BPS? Because that might be the way I'm going, although I'm guess they're not made in the U.S. 
. I'm not familiar with the Winchesters, either. I know that the Benelli Nova's awesome, but not what I'm looking for right now.
