870s are designed so well that one can take a boxful of unrelated and mismatched parts, put them together on a kitchen table, and use the result on 5 stand,pheasants,chukar,snow geese,trap, Sporting Clays and even chunking some slugs. All that and more in this last year with Frankenstein, my overpublicized parts 870.
870s exhibit such an aptitude for abuse that they're the big favorite for depts and agencies.
And, they're the least expensive, top quality shotgun there is. They're just aren't any better pumpguns.
Run a search in the Archives for 870, and plan on spending the weekend pointing,clicking and learning...