I've got a Remington SP-10. I purchased a 30" barrel and had Denny Tubbs hone the interior to a mirror finish and a consistent bore dimension from the forcing cone to the muzzle. I replaced the factory butt stock with the thumb-hole stock Remington offers. I had it dipped in Bottom Land camo, and I had a trigger job done by the gunsmith that builds my rifles for me. I then sent all the internals to Black Ice for a Teflon coating. I then pinned the barrel. I have an Aimpoint CompM4 red dot sight on it. I have several chokes I use depending on what I'm shooting. I mainly reload with Tungsten shot. For the Tungsten I use a custom choke Denny made when he honed my barrel. It's an honest 70 yard Turkey killer when I have it loaded with 2.25 oz of Tungsten shot.

I have a ridiculous amount of money invested in this shotgun.

I'll never sell it; conservatively I'd lose $1500 ~ $2000. All it is to a buyer is a used SP-10 with two holes drilled in the receiver where I pinned the barrel tang to the receiver.