I have a Rifled slug barrel that fits an 11-87 FS/FT. The barrel is still in the box, and has had less than 10 rounds through it. It's MINT! The part number is #29606. It's 21" long. It's stamped 2 3/4" and 3" shells. I'm not sure what I would be interested in in trades, but if you have something let me know. Asking $140 OBO.