If you are wanting a good tactical gun you have to go with an 870 or a 500 they have the most aftermarket stuff. If you want your gun to have tactical accessories, get with a gun smith who is willing to make custom gear. But doing it that way may cost you more than what you would want to invest in it.
"There ain't nothing better than chasing tail and staring at big racks all day."
My trusty friend is a remington 870 express super mag. I installed a blackhawk gen I collapsible stock and a truglo red/green dot