Knoxx makes some really sweet accessories for the mossberg 500. If I didn't already have a tactical stock on my mossberg 500 I would seriously consider buying this one.
I have the ATI collapsible 6 six position buttstock with pistol grip on my Mossberg 500 and absolutely love it. Great quality, great finish and great value for the price. It is very easy to use and nice to be able to adjust the length of the stock for different situations. I would have no doubts in my mind that this stock would last as long as my mossberg 500 will! I am however looking into buying a top folding ATI stock due to personal preference but I will have a hard time parting with this stock setup.