I picked up an old Mossberg 500 today from a pawnshop. It's just right to build a tactical/HD gun. It's a smooth vent rib bbl with the choke missing, and has a sight hole at about 18 to 20" on the rib, so that's how long I want it. The bluing and finish is about 80%, so im not going to be afraid to really give it a workout. Im thinking I want a pistol grip setup, but still not 100%. Where should I start? What are some good pistol grips and forearms? heat shields? extended tubes? I got this cheap, the bbl will be cut, so I'm not looking to put a Knoxx setup or anything like that on it. I wanna keep it cheap and make my first Mall Ninja gun.. Lets hear it. Thanks!