Here is a true one of a kind custom weapon.  built from all factory new parts and accessories.  I start with a 20 ga receiver, bead blast it and parkerize with black heavy zinc parkerizing to protect it in the worst of conditions.  I upgrade the trigger assembly with the police heavy carrier dog follower spring and I install a Wilson Combat over size safety.  I then intall a solid steel extractor in the bolt.  I blast and parkerize a fully rifled 18.5" cantilever barrel to match the receiver.  I install a Wilson Combat one round extension to allow you to load four 3" magnums in the tube without compacting the spring.  This has the heavy Wilson combat mag spring and combat follower.  I install a Knoxx SpecOps stock to soak up 95% of the felt recoil and to make it even better I install a Limb Saver recoil pad for comfort and to eat a little more of that recoil......I also install a high check piece to bring you up to scope level........This weapon is $700  plus shipping........ With standard recoil pad $670

You can also get this weapon with a 20" fully rifled barrel with rifle sights for $40 less.........